Assistance to the poor guard who's taking over (6)
I believe the answer is:
relief
'assistance to the poor' is the definition.
(I've seen this before)
'guard who's taking over' is the wordplay.
I cannot really understand how this works, but
'over' could be 're' and 're' is found in the answer.
The remaining letters 'lief' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for relief that I've seen before include "That feeling when a burden is removed" , "Removal of a burden" , "Alleviation or support" , "Alleviation, easing" , "Alleviation; (financial) assistance" .)