Crossword Genius

Brass player has run up to Rob (6)

Ross

I believe the answer is:

burgle

I'm a little stuck... Click here to teach me more about this clue!

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

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for burgle that I've seen before include "Steal (from a house etc)" , "Enter building to steal" , "Break in to 17 dn" , "Break in and steal" , "do so is illegal!" .)

I've seen this clue in The Times.
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