Destructive caterpillar couple fed to dog back on farm (7)

I believe the answer is:

cutworm

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'destructive caterpillar' is the definition.
'cutworm' can be an answer for 'caterpillar' (cutworm is a kind of caterpillar). I'm not certain of the 'destructive' bit.

'couple fed to dog back on farm' is the wordplay.
'couple' becomes 'two' (two people or things).
'fed to' indicates putting letters inside.
'dog' becomes 'cur' (a cur is an aggressive or scruffy dog).
'back on' says to take the final letters (the letter at the back).
The final letter of 'farm' is 'm'.
'two' inserted inside 'cur' is 'cutwor'.
'cutwor'+'m'='CUTWORM'

Can you help me to learn more?

(Other definitions for cutworm that I've seen before include "Caterpillar" , "pernicious type" , "Form of insect" .)

I've seen this clue in The Times.

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