Heading past it, leaseholder's housing (5)
I believe the answer is:
title
'heading' is the definition.
(I know that title is a type of subhead)
'past it leaseholder's housing' is the wordplay.
'housing' indicates a hidden word (part of the clue houses the answer).
'TITLE' can be found hidden inside 'past it leaseholders'.
(Other definitions for title that I've seen before include "Legal document regarding transfer of ownership: appellation" , "Name of, eg, book" , "Lord, sir, doctor, for instance" , "Sir, or madam" , "confers ownership" .)