Old carriage I observed in pursuit (6)

I believe the answer is:

chaise

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'old carriage' is the definition.
'chaise' can be an answer for 'carriage' (chaise is a kind of carriage). I am unsure of the 'old' bit.

'i observed in pursuit' is the wordplay.
'observed in' is an insertion indicator.
'pursuit' becomes 'chase' (synonyms).
'i' going inside 'chase' is 'CHAISE'.

Can you help me to learn more?

(Other definitions for chaise that I've seen before include "Light open carriage" , "... longue, chair for reclining" .)

I've seen this clue in The Times.

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