Plant extract from aphrodisiac I required held back (5)

I believe the answer is:

erica

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'plant extract' is the definition.
'erica' can be an answer for 'plant' (I've seen this before). I'm unsure of the 'extract' bit.

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for erica that I've seen before include "Moorland plant, girl's name" , "Heathland shrub; girl's name" , "Girl - heather" , "Plant genus of garden heather" , "Shrubs" .)

I've seen this clue in The Sunday Times and The Times.

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