Cat loves bits of ling and eel, tucking into small fish, larking about (10)

I believe the answer is:
tomfoolery
'ling and eel tucking into small fish larking about' is the definition.
I can't tell whether this definition defines the answer.
'cat loves bits' is the wordplay.
'cat' becomes 'tom' (a tom is a male cat).
'loves bits' becomes 'foolery' (I am not sure about this - if you are sure you should believe this answer much more).
'tom'+'foolery'='TOMFOOLERY'
'of' is the link.
Can you help me to learn more?
(Other definitions for tomfoolery that I've seen before include "hanky-panky" , "Silliness" , "Acting stupidly" , "Nonsensical behaviour" , "Shenanigans" .)
