Agree to yield to account (6)
I believe the answer is:
accede
'agree to' is the definition.
(thesaurus)
'yield to account' is the wordplay.
'yield' becomes 'cede' (synonyms).
'to' says to put letters next to each other (I've seen this in other clues).
'account' becomes 'ac' (abbreviation for account).
'cede' after 'ac' is 'ACCEDE'.
(Other definitions for accede that I've seen before include "Say yes to request" , "'Take office, as king say (6)'" , "Yield" , "Agree to proposal or take office" , "Agree (to) - come into office" .)