Requisition National Trust to support short list (6)
I believe the answer is:
indent
'requisition' is the definition.
(I've seen this before)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for indent that I've seen before include "Depression" , "Set in from the margin" , "Make recesses or notches in" , "Requisition for stores" , "Deep recess; official requisition" .)