...mostly performs at clubs potentially developing habit? (8)
I believe the answer is:
playsuit
'habit?' is the definition.
(I know that playsuit is a type of clothing)
'mostly performs at clubs potentially' is the wordplay.
'mostly' means to remove the last letter (most but not all of the word).
'performs' becomes 'plays' (I've seen this in another clue).
'at' is a charade indicator (letters next to each other).
'clubs potentially' becomes 'suit' (clubs is an example of a card suit. I am not sure about the 'potentially' bit.).
'plays' with its last letter taken off is 'play'.
'play'+'suit'='PLAYSUIT'
'developing' acts as a link.
This may not be correct. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for playsuit that I've seen before include "Baby's garment" , "Baby's onesie" .)