Ditch is patterned in two lines (7)

I believe the answer is:

distich

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'ditch is patterned in two lines' is the definition.
I can't judge whether this defines the answer.

'ditch is patterned in two lines' is the wordplay.
'ditch is' can be anagrammed to 'DISTICH'.
Though, I am not sure how this is indicated.

Can you help me to learn more?

(Another definition for distich that I've seen is " Couplet".)

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

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