Just on a fish, net caught (10)
I believe the answer is:
reasonable
'just' is the definition.
(associated in meaning)
'on a fish net caught' is the wordplay.
I cannot quite see how this works, but
'on' could be 're' (regarding) and 're' is found in the answer.
'a' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for reasonable that I've seen before include "description of rationality" , "Sound" , "Not excessive or extreme" , "Fair, rational" , "Fair - inexpensive" .)