They're drunk and sing wildly (4)
I believe the answer is:
gins
'they're drunk' is the definition.
The definition suggests an adverb but the answer is not.
'sing wildly' is the wordplay.
'wildly' indicates an anagram.
'sing' with letters rearranged gives 'GINS'.
'and' is the link.
Can you help me to learn more?
(Other definitions for gins that I've seen before include "Sings badly for drinks" , "Drinks; traps" , "Alcoholic drinks" .)