Love street full of comic potential? It won’t fly! (7)
I believe the answer is:
ostrich
'it won't fly' is the definition.
(ostriches are flightless birds)
'love street full of comic potential?' is the wordplay.
'love' becomes 'o' (love means zero in tennis).
'street' becomes 'st' (abbreviation).
'full of comic potential?' becomes 'rich' (something 'a bit rich' is amusing or comical).
'o'+'st'+'rich'='OSTRICH'
(Other definitions for ostrich that I've seen before include "The biggest bird, can't fly" , "Largest living bird" , "Largest extant bird" , "one tries to hide in the sand" , "He ignores the truth" .)