Pod contents (4)
(Other definitions for seed that I've seen before include "Top tennis player" , "Basis for new plant" , "Source -- germ" , "Pip for sowing" , "It can develop into a plant" .)
'pod contents' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for peas that I've seen before include "Edible seeds" , "Green vegetable seeds" , "birds" , "Pulses" , "Leguminous plants" .)