Somewhat abhor Mona Lisa when moody, perhaps (8)

I believe the answer is:

hormonal

I'm a little stuck... Click here to teach me more about this clue!

'moody perhaps' is the definition.
I can't judge whether this definition defines the answer.

'somewhat abhor mona lisa' is the wordplay.
'somewhat' indicates the answer is hidden within the clue.
'HORMONAL' is hidden in the letters of 'abhor mona lisa'.

'when' acts as a link.

Can you help me to learn more?

(Other definitions for hormonal that I've seen before include "Of endocrine gland secretions" , "Relating to body-regulating substances" .)

I've seen this clue in the Sydney Morning Herald.

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