Foreign currency note found on top of the Cenotaph? (8)
I believe the answer is:
memorial
'the cenotaph?' is the definition.
(cenotaph is a kind of memorial)
'foreign currency note found on top of' is the wordplay.
'foreign currency' becomes 'rial' (currency of Iran).
'note' becomes 'memo' (memo is a kind of note).
'found on top of' is a charade indicator (letters next to each other).
'rial' after 'memo' is 'MEMORIAL'.
(Other definitions for memorial that I've seen before include "may be brass" , "Monument to commemorate" , "Record" , "statement of facts" , "Commemorative object" .)