Anti-florists? Use butchers for romantic behaviour (15)

I believe the answer is:

flirtatiousness

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'romantic behaviour' is the definition.
The definition suggests a singular noun which matches the answer.

'anti-florists? use butchers' is the wordplay.
'butchers' is an anagram indicator (I've seen 'butchered' mean this (I've seen this in other clues)).
'anti'+'florists'+'use'='antifloristsuse'
'antifloristsuse' is an anagram of 'FLIRTATIOUSNESS'.

'for' is the link.

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

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