In antiquity, relatively important place
I believe the answer is:
tyre
'place' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'in antiquity relatively important' is the wordplay.
'in' indicates a hidden word.
'TYRE' is hidden within 'antiquity relatively important'.
Can you help me to learn more?
(Other definitions for tyre that I've seen before include "Lebanese port - wheel surround" , "A spare one round the middle is fat" , "A circular cushion" , "Rubber wheel casing" , "Pumped-up" .)