Pin on (3)
I believe the answer is:
leg
This clue is a double definition.
'pin' is the first definition.
(pins is slang for legs)
'on' is the second definition.
(cricket term, fielding positions)
(Other definitions for leg that I've seen before include "Limb; stage" , "Lower limb" , "prop" , "Section of journey; limb" , "Support; cricket side" .)