Favourite heavyweight of a town in the north of England (10)
I believe the answer is:
darlington
'a town in the north of england' is the definition.
I can't tell whether this definition defines the answer.
'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' acts as a 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]" .)