Loving to fuss round (7)
I believe the answer is:
adoring
'loving' is the definition.
(I've seen this before)
'fuss round' is the wordplay.
'fuss' becomes 'ado' ('ado' can be a synonym of 'fuss').
'round' becomes 'ring' ('ring' can be a synonym of 'round').
'ado'+'ring'='ADORING'
'to' is the link.
(Other definitions for adoring that I've seen before include "Being very fond of" , "Worshipping the loved one" , "Passionate" , "Showing great affection" , "Very keen on" .)