Gun with small nozzle? (7)
I believe the answer is:
shooter
'gun' is the definition.
(thesaurus)
'small nozzle?' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'nozzle?' becomes 'hooter' ('hooter' can be a synonym of 'nozzle').
's'+'hooter'='SHOOTER'
'with' is the link.
(Other definitions for shooter that I've seen before include "small arm?" , "Gun (sl.)" , "that rolls along the ground" , "Gun - ball that keeps unexpectedly low" , "One who has an attempt at goal" .)