Crossword Genius

One of two bound for power (4)


I believe the answer is:


'one of two bound' is the definition.

'for power' is the wordplay.
'for' becomes 'pro' (as in being 'pro' something).
'power' becomes 'p' (symbol in physics).

(Other definitions for prop that I've seen before include "Object used on the set of a play" , "Support; object used on stage" , "Shore for 4 down" , "Set piece" , "Moveable object used on stage" .)

I've seen this clue in The Guardian.
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