Sketch in the middle of cabaret alludes to item on tractor (7)

I believe the answer is:

drawbar

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'alludes to item on tractor' is the definition.
I can't judge whether this defines the answer.

'sketch in the middle of cabaret' is the wordplay.
'sketch' becomes 'draw' (to sketch is to draw).
'in the middle of' means to look at the middle letters (I've seen 'in the middle' mean this).
The middle letters of 'cabaret' are 'bar'.
'draw'+'bar'='DRAWBAR'

Can you help me to learn more?

I've seen this clue in The Irish Times.

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