Starts to stroll through ornate ancient colonnade (4)

I believe the answer is:

stoa

'colonnade' is the definition.
(I've seen this before)

'starts to stroll through ornate ancient' is the wordplay.
'starts to' suggests taking the first letters.
The first letters of 'stroll through ornate ancient' is 'STOA'.

(Other definitions for stoa that I've seen before include "Oast (anag.)" , "Architectural feature" , "Portico in ancient Greece" , "It sheltered Greeks walking" , "Series of columns covered" .)

I've seen this clue in The Independent.

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