Political group, crafty on the quiet? (5)
I believe the answer is:
party
'political group' is the definition.
(I've seen this before)
'crafty on the quiet?' is the wordplay.
'crafty' becomes 'arty' (I am not sure about this - if you are sure you should believe this answer much more).
'on' is a charade indicator (letters next to each other).
'the quiet?' becomes 'p' (music symbol for 'piano', ie soft or quiet).
'arty' put after 'p' is 'PARTY'.
Can you help me to learn more?
(Other definitions for party that I've seen before include "Social gathering; person" , "See 22" , "Political organisation" , "Political group - celebration" , "Social occasion - political group" .)