Plant is put back in store (7)
I believe the answer is:
deposit
'plant' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'is put back in store' is the wordplay.
'put back' says the letters should be written backwards.
'in' indicates putting letters inside.
'store' becomes 'depot' (depot can mean a store or warehouse).
'is' written backwards gives 'si'.
'si' placed into 'depot' is 'DEPOSIT'.
Can you help me to learn more?
(Other definitions for deposit that I've seen before include "Put down - initial payment" , "Lay down" , "Put down - leave behind" , "Layer laid down" , "Set down" .)