Solitary facts I dealt with well (14)
I believe the answer is:
satisfactorily
'well' is the definition.
(synonyms)
'solitary facts i dealt' is the wordplay.
'dealt' is an anagram indicator.
'solitary'+'facts'+'i'='solitaryfactsi'
'solitaryfactsi' anagrammed gives 'SATISFACTORILY'.
'with' acts as a link.
(Other definitions for satisfactorily that I've seen before include "to an acceptable standard" , "convincingly" .)