Hull element turns up for Peak District town (4)
I believe the answer is:
leek
'peak district town' is the definition.
(Leek is a town in the Peak District)
'hull element turns up' is the wordplay.
'hull element' becomes 'keel' (part of a boat's hull).
'turns up' says the letters should be written backwards.
'keel' written backwards gives 'LEEK'.
'for' acts as a link.
(Other definitions for leek that I've seen before include "One of the veggies" , "Plant (onion relative) eaten as a vegetable" , "National emblem of Wales." , "Vegetable of the onion family" , "Vegetable symbol of Wales" .)