I'd ceded ground, determined (7)
I believe the answer is:
decided
'determined' is the definition.
(synonyms)
'i'd ceded ground' is the wordplay.
'ground' indicates an anagram ('grind' the letters into a new form).
'id'+'ceded'='idceded'
'idceded' is an anagram of 'DECIDED'.
(Other definitions for decided that I've seen before include "Made mind up, being unequivocal" , "Unquestionable" , "Marked" , "Indisputable" , "Determined - settled" .)