Kelvin assessed lasciviously becomes agitated (5-2)

I believe the answer is:

keyed-up

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'agitated' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'kelvin assessed lasciviously' is the wordplay.
'kelvin' becomes 'K' (abbreviation for the unit of temperature).
'assessed lasciviously' becomes 'eyed up' (I've seen this in another clue).
'k'+'eyedup'='KEYED-UP'

'becomes' acts as a link.

Can you help me to learn more?

I've seen this clue in The Independent.

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