Poems about salts (5)

I believe the answer is:

epsom

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

'poems about' is the wordplay.
'about' indicates an anagram.
'poems' is an anagram of 'EPSOM'.

(Other definitions for epsom that I've seen before include "Classic racecourse" , "English town, of course?" , "Racecourse near London" , "& 5 Purgative medicine" , "Derby area" .)

I've seen this clue in The Globe and Mail.

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