Crossword Genius

My bits (6)

Ross

I believe the answer is:

crumbs

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

'bits' is the definition.
(I know this)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for crumbs that I've seen before include "Surprised expression; bread fragments" , "Gosh!" , "Bits of bread - expression of dismay!" , "Morsels of bread" , "By heck! -all that's left of the cake?" .)

I've seen this clue in The Telegraph.
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