Wonky line cut by fine horse unsuited to ploughing (8)

I believe the answer is:

inarable

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'unsuited to ploughing' is the definition.
I can't judge whether this definition defines the answer.

'wonky line cut by fine horse' is the wordplay.
'wonky' indicates anagramming the letters (the original order is disrupted or wonky ).
'cut by' indicates putting letters inside (some letters cut into others).
'fine horse' becomes 'arab' (I've seen this in another clue).
'line' is an anagram of 'inle'.
'inle' going around 'arab' is 'INARABLE'.

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I've seen this clue in The Times.

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