Financial backer of a Northern setter (5)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
angel
'financial backer' is the definition.
(I've seen this in another clue)
'a northern setter' is the wordplay.
'northern' becomes 'n' (abbreviation e.g. N. Ireland).
'setter' becomes 'gel' (something which sets).
'a'+'n'+'gel'='ANGEL'
'of' is the link.
(Other definitions for angel that I've seen before include "Winged messenger" , "Heavenely messenger" , "Heavenly body" , "Theatre financier" , "lady (very kind)" .)