Brute of a fellow mostly seen round the province (6)
I believe the answer is:
animal
'brute' is the definition.
(I know that brute can be written as animal)
'a fellow mostly seen round the province' is the wordplay.
'a fellow mostly' becomes 'amal' (I can't justify this - if you can you should believe this answer much more).
'seen round' is an insertion indicator.
'the province' becomes 'NI' (short for Northern Ireland, a province of the UK).
'amal' enclosing 'ni' is 'ANIMAL'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for animal that I've seen before include "Mammal" , "Organism having life" , "Kind of instinct" , "something in the zoo?" , "Beastly" .)