Decide, though it’s close (8)
I believe the answer is:
conclude
I believe this is a double definition.
'decide' is the first definition.
(I've seen this before)
'it's close' is the second definition.
(thesaurus)
'though' acts as a link.
(Other definitions for conclude that I've seen before include "Decide - terminate" , "Decide by reasoning or draw to a close" , "Bring or come to an end (8)" , "Finish - deduce" , "Finally decide" .)