Two ants confused love for orange dye (7)

I believe the answer is:

annatto

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'orange dye' is the definition.
The definition suggests a singular noun which matches the answer.

'two ants confused love' is the wordplay.
'two ants' can mean two replacements for 'ant'.
'confused' indicates an anagram.
'love' becomes 'o' (love means zero in tennis).
'ant'+'ant'='antant'
'antant' anagrammed gives 'annatt'.
'annatt'+'o'='ANNATTO'

'for' acts as a link.

Can you help me to learn more?

(Other definitions for annatto that I've seen before include "Food dye from red pulp of tropical fruit" , "Orange-red dye" , "food colouring" , "dyestuff" , "Orange colouring" .)

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

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