Semblance of fish starting to bite (4)
I believe the answer is:
garb
'semblance' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
'fish starting to bite' is the wordplay.
'fish' becomes 'gar' (type of gar).
'starting to' suggests taking the first letters.
The first letter of 'bite' is 'b'.
'gar'+'b'='GARB'
'of' is the link.
Can you help me to learn more?
(Other definitions for garb that I've seen before include "Dress - habit" , "Dress - clothing" , "Style of clothing" , "Covering" , "Clothe" .)