Maybe she's only a rabbit (3)

I believe the answer is:

doe

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'rabbit' is the definition.
(I have seen 'Female rabbit ' mean 'doe' so perhaps 'rabbit' could also mean 'doe')

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for doe that I've seen before include "She eats vegetarian food" , "Mummy rabbit" , "Female creature" , "Feminine counterpart of stag" , "female in the field?" .)

I've seen this clue in the Evening Standard.

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