Ancient Med city gate, arch, recollected (8)
I believe the answer is:
carthage
'ancient med city' is the definition.
'carthage' can be an answer for 'city' (I've seen this before). I am unsure of the 'ancient med' bit.
'gate arch recollected' is the wordplay.
'recollected' is an anagram indicator (letters recollected and rearranged).
'gate'+'arch'='gatearch'
'gatearch' anagrammed gives 'CARTHAGE'.
Can you help me to learn more?
(Other definitions for carthage that I've seen before include "It fought the Punic wars against ancient Rome" , "Phoenician city state near modern Tunis" , "Dido was queen of this ancient city in N Africa" , "Ancient N. African city" , "Hannibal's home city" .)