Babe who halved the totals (3)
I believe the answer is:
tot
'babe' is the definition.
(I've seen this in another clue)
'halved the totals' is the wordplay.
'halved' indicates taking half.
'totals' with half the letters taken is 'TOT'.
'who' acts as a link.
(Other definitions for tot that I've seen before include "Add; small child" , "Small drink of spirits" , "Add; young child" , "Nip" , "slug?" .)