Stronghold strikes heard over store of gold (4,4)
I believe the answer is:
fort knox
'store of gold' is the definition.
The definition suggests a singular noun which matches the answer.
'stronghold strikes heard' is the wordplay.
'stronghold' becomes 'fort' (I've seen this in another clue).
'strikes' becomes 'knocks' (knocking is a kind of striking).
'heard' shows a homophone (sound like).
'knocks' is a homophone of 'knox'.
'fort'+'knox'='FORT KNOX'
'over' acts as a link.
Can you help me to learn more?
(Other definitions for fort knox that I've seen before include "Site of the US Gold Bullion Depository" , "American military reservation which holds the nation's gold bullion" , "Military reservation in Kentucky which guards America's gold" , "Location of US gold depository" , "Secure location" .)