Roll with innards of perch - a long, snaky fish? (4)
I believe the answer is:
reel
'roll' is the definition.
(eg a reel or roll of film)
'innards of perch a long snaky fish?' is the wordplay.
'innards of' says to take the centre.
'a long snaky fish?' becomes 'eel' (I can't explain this - if you can you should give a lot more credence to this answer).
The central letter of 'perch' is 'r'.
'r'+'eel'='REEL'
'with' is the link.
Can you help me to learn more?
(Other definitions for reel that I've seen before include "Lively dance; bobbin" , "Dance - sway - cotton holder" , "Cylinder on which something is wound" , "A merry dance or an angler's winder" , "Show astonishment" .)