Spread litter produced by one? (3)
I believe the answer is:
sow
I believe this is a double definition.
'spread' is the first definition.
(sowing is a kind of spreading)
'litter produced by one?' is the second definition.
(a sow may give birth to a litter of pigs)
(Other definitions for sow that I've seen before include "Broadcast" , "She lives in 11" , "Prepare farmland" , "Scatter seed; pig" , "Plant seeds for the pig" .)