Crossword Genius

Leprous relative Jane edges away! (7)

Ross

I believe the answer is:

unclean

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'leprous' is the definition.
Although both the answer and definition are adjectives, I can't see how they can define each other.

'relative jane edges away' is the wordplay.
'relative' becomes 'uncle' (uncle is a kind of relative).
'edges away' says to take the centre (I've seen 'edging away' mean this).
The middle letters of 'jane' are 'an'.
'uncle'+'an'='UNCLEAN'

Can you help me to learn more?

(Other definitions for unclean that I've seen before include "Ceremonially impure" , "Contaminated" , "Polluted" , "Defiled" , "Dirty, needs a wash" .)

I've seen this clue in The Sun.
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