Crossword Genius

Gosh, is that all the bread that's left? (6)

Ross

I believe the answer is:

crumbs

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

'gosh' is the definition.
(I've seen this before)

I cannot 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 "Tiny bits of bread - golly!" , "By heck! -all that's left of the cake?" , "Morsels of bread" , "Surprised expression; bread fragments" , "Small bread particles" .)

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