You must shelter leader of Resistance - voila! (5)
I believe the answer is:
there
'you must shelter' is the definition.
I can't judge whether this definition defines the answer.
'leader of resistance voila' is the wordplay.
I cannot quite understand how this works, but
'leader' could be 'e' (I've seen this in other clues) and 'e' is found in the answer.
'resistance' could be 'r' (electronics abbreviation) and 'r' is present in the answer.
The remaining letters 'the' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for there that I've seen before include "in that case" , "It's said to convey sympathy" , "Place: as indicated" , "expression of sympathy" , "that particular place" .)