Favourite heavyweight of a town in the north of England (10)
I believe the answer is:
darlington
'town in the north of england' is the definition.
'darlington' can be an answer for 'town' (I've seen this before). I'm not certain of the 'in the north of england' bit.
'favourite heavyweight' is the wordplay.
'favourite' becomes 'darling' (darling can mean a favourite).
'heavyweight' becomes 'ton' (a ton weighs a lot).
'darling'+'ton'='DARLINGTON'
'of a' is the link.
Can you help me to learn more?
(Other definitions for darlington that I've seen before include "rail terminus" , "northern town" , "Terminus of the world's first passenger railway" , "Town near 24 [MARSKE]" .)