Captivate during the tenth rally (7)
I believe the answer is:
enthral
'captivate' is the definition.
(I've seen this before)
'during the tenth rally' is the wordplay.
'during' indicates the answer is hidden within the clue.
'ENTHRAL' can be found hidden inside 'tenth rally'.
(Other definitions for enthral that I've seen before include "rivet" , "Fascinate - grip" , "Delight - transport" , "hypnotise" , "absorb" .)