Smallest, slightest (5)

I believe the answer is:

least

I believe this is a double definition.

'smallest' is the first definition.
(synonyms)

'slightest' is the second definition.
(similar in meaning)

(Other definitions for least that I've seen before include "Superlatively little" , "Steal (anag)" , "Most unimportant" , "Smallest, being stale" , "Of minimal significance" .)

I've seen this clue in The Times, the Irish Times (Simplex) and The Irish Times.

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