Pronounced piggy pull (3)
I believe the answer is:
tow
'pull' is the definition.
(tow is a kind of pull)
'pronounced piggy' is the wordplay.
'pronounced' indicates a 'sounds like' (homophone) clue.
'piggy' becomes 'toe' (I've seen this in another clue).
'toe' sounds like 'TOW'.
(Other definitions for tow that I've seen before include "Haul" , "Prepared fibres" , "form of flax" , "Draw" , "Tug" .)