See a race to its conclusion (6)
I believe the answer is:
attend
'see' is the definition.
(thesaurus)
'a race to its conclusion' is the wordplay.
I cannot really see how this works, but
'a' is within the answer.
'race' could be 'tt' and 'tt' is found within the answer.
'conclusion' could be 'end' (something's conclusion is its end) and 'end' is located in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for attend that I've seen before include "Wait and listen" , "put in an appearance" , "notice" , "Pay heed" , "take heed" .)