Admit, recognise (11)
I believe the answer is:
acknowledge
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">admit</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that admit can be written as acknowledge)</span><br/ ><br/ >'<span class="explanation-format__original">recognise</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ ></span>
(Other definitions for acknowledge that I've seen before include "Express thanks for" , "Admit the truth of (something)" , "Admit - recognise - thank" , "Show recognition of" , "Confirm (receipt)" .)