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Result of crossing a vegetable with an insect? (7,4)

Ross

I believe the answer is:

cabbage moth

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'result of crossing' is the definition.
The definition suggests a singular noun which matches the answer.

'a vegetable with an insect?' is the wordplay.
'a vegetable' becomes 'cabbage' (cabbage is a kind of vegetable).
'with' means one lot of letters go next to another.
'an insect?' becomes 'moth' (moth is a kind of insect).
'cabbage'+'moth'='CABBAGE MOTH'

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