Crossword Genius

Boom supports (5)

Ross

I believe the answer is:

masts

'boom supports' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for masts that I've seen before include "things for flags" , "Eg, transmitter towers" .)

I've seen this clue in the Thinks.com and the USA Today.
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