One or two girls that might add taste (8)

I believe the answer is:

rosemary

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'one or two girls' is the definition.
(Rose and Mary or just Rosemary)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for rosemary that I've seen before include "Evergreen flowering shrub - girl's name" , "Name of girl or herb" , "Herb - girl's name(s)" , "Culinary herb" , "Aromatic shrub" .)

I've seen this clue in The Telegraph.

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