Una more disposed to fill with love (7)
I believe the answer is:
enamour
'fill with love' is the definition.
(I've seen this before)
'una more disposed' is the wordplay.
'disposed' is an anagram indicator.
'una'+'more'='unamore'
'unamore' anagrammed gives 'ENAMOUR'.
'to' acts as a link.
(Other definitions for enamour that I've seen before include "Enchant" , "entrance" , "sweep one off one's feet" , "Charm, captivate" , "Our name (anag)" .)