Recognize, accept (11)
I believe the answer is:
acknowledge
I believe this clue is a double definition.
'recognize' is the first definition.
(synonyms)
'accept' is the second definition.
(acknowledging is a kind of accepting)
(Other definitions for acknowledge that I've seen before include "Indicate obligation to" , "Confess" , "Express thanks for" , "Show recognition of" , "Confirm (receipt)" .)