Swear to take Victor to the town centre (3)
I believe the answer is:
vow
'swear' is the definition.
(I've seen this before)
'victor to the town centre' is the wordplay.
'victor' becomes 'V' (phonetic alphabet: alpha, bravo, charlie etc.).
'to the town centre' becomes 'ow' (central letters of the word 'town').
'v'+'ow'='VOW'
'to take' is the link.
(Other definitions for vow that I've seen before include "Oath or solemn promise" , "Pledge, take oath" , "Promise, swear" , "Plight" , "Solemn pledge" .)