Satirical piece needing small equipment (4)
I believe the answer is:
skit
'satirical piece' is the definition.
(I've seen this before)
'small equipment' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'equipment' becomes 'kit' (kit is a kind of equipment**).
's'+'kit'='SKIT'
'needing' is the link.
(Other definitions for skit that I've seen before include "Comic sketch" , "Brief satirical sketch" , "Short humorous play" , "Opportunity to take off" , "Burlesque - parody" .)