Head of security outfit in satirical sketch (4)
I believe the answer is:
skit
'satirical sketch' is the definition.
(a skit is a short comedy sketch)
'head of security outfit' is the wordplay.
'head of' says to take the initial letters.
'outfit' becomes 'kit' (synonyms).
The first letter of 'security' is 's'.
's'+'kit'='SKIT'
'in' acts as a link.
(Other definitions for skit that I've seen before include "Short humorous act" , "Parodic sketch" , "Short comic piece" , "Short humorous play" , "Short play which makes fun of something" .)