Crossword Genius

Draws one into the set-up (4)

Ross

I believe the answer is:

ties

'draws' is the definition.
('tie' can be a synonym of 'draw')

'one into the set-up' is the wordplay.
'one' becomes 'i' (Roman numeral).
'into' indicates putting letters inside.
'up' says the letters should be written backwards (in down clue: letters go upwards).
'i' going into 'set' is 'seit'.
'seit' back-to-front is 'TIES'.

(Other definitions for ties that I've seen before include "obligations" , "Links" , "Attaches, knots" , "Fastens with a knot" , "allegiances" .)

I've seen this clue in the Evening Standard.
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