Horse in handicap, in touch (5)
I believe the answer is:
Here is my best explanation:
'horse' is the definition.
(pinto is a kind of horse)
'in handicap in touch' is the wordplay.
'in' indicates the answer is hidden within the clue.
'PINTO' can be found hidden inside 'handicap in touch'.
(Other definitions for pinto that I've seen before include "Piebald horse (US)", "Mount", "H [HORSE]", "Horse", "patchy horse", "A piebald pony" and "Spotted or piebald horse".)