Page is held by older office appliance (7)
I believe the answer is:
stapler
'office appliance' is the definition.
'page is held by older' is the wordplay.
'page' becomes 'p'.
'is held by' means one lot of letters goes inside another.
'older' becomes 'staler' ('stale' can be a synonym of 'old').
'p' placed into 'staler' is 'STAPLER'.
(Other definitions for stapler that I've seen before include "Office equipment - plaster (anag)" , "Office fastener" , "Item of office equipment" , "Implement for inserting paper fasteners" , "Paper fastener" .)