Guys in commercial getting change (5)
I believe the answer is:
amend
'change' is the definition.
(amending is a kind of changing)
'guys in commercial' is the wordplay.
'guys' becomes 'men' (guy can mean a man).
'in' is an insertion indicator.
'commercial' becomes 'ad' (abbreviation for advertisement).
'men' placed into 'ad' is 'AMEND'.
'getting' acts as a link.
(Other definitions for amend that I've seen before include "Change, alter" , "Rectify" , "Change to improve" , "Corrct error, make a minor aleration" , "Revise" .)