Possibly married someone who thought a lot of another (7)
I believe the answer is:
admirer
'someone who thought a lot of another' is the definition.
'admirer' can be an answer for 'someone' (admirer is a kind of someone). I'm not sure about the remainder of the definition.
'possibly married' is the wordplay.
'possibly' is an anagram indicator.
'married' with letters rearranged gives 'ADMIRER'.
Can you help me to learn more?
(Other definitions for admirer that I've seen before include "Supporter or suitor" , "One who cherishes, like boy friend" , "Hopeful lover?" , "One who regards (someone) with respect" , "Suitor; devotee" .)