Crossword Genius

Integrate lines mistakenly where colon is found (5,9)

Ross

I believe the answer is:

large intestine

I'm a little stuck... Click here to teach me more about this clue!

'where colon is found' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

'integrate lines mistakenly' is the wordplay.
'mistakenly' indicates anagramming the letters.
'integrate'+'lines'='integratelines'
'integratelines' with letters rearranged gives 'LARGE INTESTINE'.

Can you help me to learn more?

(Other definitions for large intestine that I've seen before include "Part of one's innards" , "food processor" , "part of digestive system" , "this processes waste" .)

I've seen this clue in The Times.
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