Aid workers rent op shop (6-4,5)

'shop' is the definition.
(second-hand store is a kind of shop)

'aid workers rent op' is the wordplay.
I cannot really understand how this works, but
'aid' could be 'hand' (hand is a kind of aid) and 'hand' is present in the answer.
'workers' could be 'seconds' (second is a kind of worker) and 'seconds' is located in the remaining letters.
'rent' could be 'tore' ('rend' and 'tear' both mean to rip something) and 'tore' is found within the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?