Cryptic crossword No 3,925

Across

• 1 across90s RnB instruction manual song? Show 2 Romans twisted Oxygen+Hydrogen cocktail. (4,2,3,2,2,2)
• 9 acrossHarmful, guilty, and I also hear they are penniless. (7)
• 10 acrossMostly mobile disruption, still on hold (5)
• 11 acrossIn balance... I am the life and soul of the party (6)
• 13 acrossElectrical component, or sister, becomes troubled (8)
• 14 acrossIt may sound like I'm fibbing, but I'm an ancient stringed instrument (4)
• 15 acrossBecoming more Italian, perhaps, when leaning back. That's textbook. (10)
• 17 acrossSpill fee lingers within, makes one queasy (3,7)
• 19 acrossSmall Scottish island. I hear she's mine! (4)
• 21 acrossDormant, but sounds like the opposite (8)
• 23 across500 tapes wound, they're very good at what they do (6)
• 24 acrossSounds like an honourable and charming spy (5)
• 25 acrossFootballer accident helps inner town go a long way (3,4)
• 27 acrossToxic Rear Street acid's off limits (10,5)