Name a flower (5)

I believe the answer is:

calla

'flower' is the definition.
(calla is a kind of flower)

'name a' is the wordplay.
'name' becomes 'call' (to call them someone something is to name them).
'call'+'a'='CALLA'

(Other definitions for calla that I've seen before include "Form of lily" , "South African plant" , "Variety of lily" .)

I've seen this clue in The Guardian.

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