Reported location for reference (4)
I believe the answer is:
cite
'for reference' is the definition.
(to cite is to mention or quote)
'reported location' is the wordplay.
'reported' shows a homophone (sound like).
'location' becomes 'site' (site is a kind of location).
'site' is a homophone of 'CITE'.
(Other definitions for cite that I've seen before include "Summons - quote" , "Make reference to" , "Quote (a reference)" , "Repeat a passage from some written work" , "Use quotations" .)