Seed holders lying around potting sheds (4)
I believe the answer is:
pods
'seed holders' is the definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Maybe there's an association between them I don't understand?
'lying around potting sheds' is the wordplay.
'lying' becomes 'lapping' (lapping is a kind of lying).
'around' says to take the centre.
'potting sheds' becomes 'ods' (I can't explain this - if you can you should give a lot more credence to this answer).
The centre of 'lapping' is 'p'.
'p'+'ods'='PODS'
Can you help me to learn more?
(Other definitions for pods that I've seen before include "some seals" , "Seed cases" , "Pea cases" , "From enclosed cabins" , "Seed containers" .)