Do good adult dance (5)
I believe the answer is:
conga
'dance' is the definition.
(conga is a kind of dance)
'do good adult' is the wordplay.
'do' becomes 'con' (both can mean to defraud).
'good' becomes 'g' (abbreviation).
'adult' becomes 'a' (abbreviation).
'con'+'g'+'a'='CONGA'
(Other definitions for conga that I've seen before include "Latin American dance performed in single file" , "What gets line moving rhythmically" , "Dance of 3 steps and a kick by people in single file" , "wiggling line" , "Snaking Latin American dance" .)