People carrying clubs, rat gets squished! (7)
I believe the answer is:
caddies
'people carrying clubs' is the definition.
'rat gets squished' is the wordplay.
'rat' becomes 'cad' (I've seen this in other clues).
'gets squished' becomes 'dies'.
'cad'+'dies'='CADDIES'
(Other definitions for caddies that I've seen before include "They carry golf clubs" , "Golf attendants" , "Tea cans" , "man seen carrying clubs" , "Golf clubs carriers" .)