Fishy item in bagging area (3)
I believe the answer is:
gar
'fishy item' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'in bagging area' is the wordplay.
'in' indicates the answer is hidden within the clue.
'GAR' is hidden within 'bagging area'.
Can you help me to learn more?
(Other definitions for gar that I've seen before include "Type of fish" , "Pike-like fish" , "swimmer" , "Creature" , "A fish; cloth scrap (reversed)" .)