A peculiar kind of lily? (4)

I believe the answer is:

arum

'kind of lily?' is the definition.
(I've seen this in another clue)

'a peculiar' is the wordplay.
'peculiar' becomes 'rum' (synonyms).
'a'+'rum'='ARUM'

(Other definitions for arum that I've seen before include "plant with a white spathe" , "Eg, cuckoo pint" , "genus of plants" , "Plant of the family Araceae, eg lords-and-ladies" , "Perennial" .)

I've seen this clue in the Evening Standard.

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