Who cares if second husband gets wig? (5)
I believe the answer is:
shrug
'who cares if' is the definition.
I can't tell whether this definition defines the answer.
'second husband gets wig?' is the wordplay.
'second' becomes 's' (common abbreviation).
'husband' becomes 'h'.
'gets' is a charade indicator (letters next to each other).
'wig?' becomes 'rug' (rug is a slang term for a wig).
's'+'h'+'rug'='SHRUG'
Can you help me to learn more?
(Other definitions for shrug that I've seen before include "Gesture expressing unconcern" , "woolly" , "Express silent doubt" , "Momentarily raise the shoulders" , "Show lack of concern" .)