Debate extremes of weather with fish (7)
I believe the answer is:
wrangle
'debate' is the definition.
(thesaurus)
'extremes of weather with fish' is the wordplay.
'extremes of' suggests removing the centre.
'with' says to put letters next to each other.
'fish' becomes 'angle' (angling is a kind of fishing**).
'weather' with its centre taken out is 'wr'.
'wr'+'angle'='WRANGLE'
(Other definitions for wrangle that I've seen before include "Complicated dispute" , "angry argument" , "Noisy dispute" , "Altercation" , "noisy argument" .)