Tory suggestion about bin for mistress (9)

I believe the answer is:

concubine

'for mistress' is the definition.
(concubine is a kind of mistress)

'tory suggestion about bin' is the wordplay.
'tory' becomes 'con' (abbreviation for Conservative).
'suggestion' becomes 'cue' (I've seen this in other clues).
'about' indicates putting letters inside.
'cue' placed around 'bin' is 'cubine'.
'con'+'cubine'='CONCUBINE'

(Another definition for concubine that I've seen is " Unmarried woman cohabiting with a man - secondary wife".)

I've seen this clue in The Sun.

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