Looks at fish eaten by communists (7)
I believe the answer is:
regards
'looks at' is the definition.
(regarding is a kind of looking at)
'fish eaten by communists' is the wordplay.
'fish' becomes 'gar' (type of gar).
'eaten by' means one lot of letters goes inside another (inserted letters get eaten).
'communists' becomes 'reds' (red is a kind of communist).
'gar' put into 'reds' is 'REGARDS'.
(Other definitions for regards that I've seen before include "what to put before signature?" , "Views; good wishes" , "Observes" , "Gets a load of" , "Contemplates" .)