Cryptic crossword No 4,137

Down

• 1 downUnlimited pints crush liver - that's disturbing (9)
• 2 downDishonestly persuade inmate to study (3)
• 3 downEngineers drink liquor at US compound - no need to explain (3,4,8)
• 4 downHalf-open needlework cases put back in bathroom (2,5)
• 5 downPetrol is converted into gas using this (8,7)
• 6 downSend telegram cancelling with exasperation (3)
• 7 downI drape new babywear in 5 (5)
• 11 downNancy's cat given Vichy water in Bordeaux estate (7)
• 12 downAt home Virginia's held up by the German housebreaker (7)
• 15 downTo turn up wearing white topless dress ultimately shows overconfidence (9)
• 17 downAttack solver? Might get 'no' for an answer (3,4)
• 18 downStarts to believe Eurydice left Orpheus weeping in underworld ... (5)
• 20 down... drawback: makes up large part of it (3)
• 22 downIt might be boring having rules when cycling (3)