Clue contest No 41

Enemy taking daughter to north Norway island for a date (11)

Def = a date, Substitution of NNI (north Norway island) for D (daughter) in a word for enemy (ADVERSARY)

Vera, Ryan sin merrily in celebration? (11)

VERARYANSIN*; def = "celebration"

One arrives potentially around New Year (11)

&lit AN(N)ARRIVES*+Y

Topless bird swallowed everything with no limits - a date to remember (11)

Canary without first letter, around universe without first or last letters

Year marked by bombing Iran with nervy allies at the margins (11)

Def: year marked, *[IRAN + NERVY + A~S]

Church avoids anarchy, admitting Reverend caught in sin brought up wedding date? (11)

ANAR(ch)Y admitting NIVERS ('Reverend caught in sin brought up') = Defn. ('wedding date?')

A 5 wood or a 6 iron to reach the milestone? (11)

Wood is 5th wedding anniversary and iron is 6th

Nirvana's out of tune, gulping down mixed Canadian Whisky to commemorate date (11)

Anagram of Nirvana mixed with Anagram of Rye

Nervy as rain disrupted commemoration (11)

NERVY AS RAIN*

For jubilee blanket tips are suspended in one line (11)

Def: JUBILEE. [U]NIVERSA[L] (blanket - tips are suspended) in AN (one) RY (line)

Musical with lyrics by Prince announced in London celebration (11)

Homophone of ANNIE (musical) VERSE (lyrics) ‘ARRY (London pronunciation of Harry)

Time to celebrate good match as opponent departs, leaving for pub in reflection (11)

Def: Time to celebrate good match. ADVERSARY (opponent) with D (departs) leaving for INN (pub) reversed (in reflection)

Celebration of Nirvana’s filthy lines about Love’s tail (11)

NIRVANAS* + RY, about ~E. A celebratory Courtney Love claimed Heart-Shaped Box was about just this. I’ll spare you her quote and Cobain's lyrics! Tail = female genitalia (Chambers)

An exotic river, say, with number and second diamond maybe (11)

An + riversay* with extra n (number) and s (second). Def by example - diamond

A northern part of UK and the majority of island involved in really special occasion (11)

A N (northern) NI (part of UK) SAR[k] (the majority of island) in VERY (really)

Regular post-match celebration? (11)

Cryptic Definition

Shortened Play on words, as lines for celebration of love (11)

ANNI(e)+VERS(e)+A(s) (Shortened play, words, as) + RY (lines=railway)=celebration of love

You observe it every year - A Rayner’s on manoeuvres, inspiring northern industrial voters primarily (11)

Def = you observe it every year; Anag of ARAYNERS containing NIV