One side of a tea strainer (4)

I believe the answer is:

east

'one side' is the definition.
(east side is a kind of side)

'of a tea strainer' is the wordplay.
'of' indicates the answer is hidden within the clue.
'EAST' is hidden in the letters of 'tea strainer'.

(Other definitions for east that I've seen before include "English region" , "course" , "the way the Wise Men came from" , "Where the sun rises" , "major point" .)

I've seen this clue in the Evening Standard.

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