Crossword Genius

Large woman in union crime (6)

Ross

I believe the answer is:

bigamy

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

'union crime' is the definition.
'bigamy' can be an answer for 'crime' (I know that bigamy is a type of statutory offence). I am unsure of the 'union' bit.

'large woman' is the wordplay.
'large' becomes 'big' (synonyms).
'woman' becomes 'amy' ().
'big'+'amy'='BIGAMY'

'in' acts as a link.

Can you help me to learn more?

(Other definitions for bigamy that I've seen before include "Instance of having two spouses" , "Crime of marrying while still married to another" , "Crime involving two better halves!" , "having two husbands?" , "Having more than one spouse, illegally" .)

I've seen this clue in The Sun.
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