Crossword Genius

What belly dancer reveals during guitar solo? (7)

Ross

I believe the answer is:

midriff

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

'solo?' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

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

Can you help me to learn more?

(Other definitions for midriff that I've seen before include "Tummy area" , "Diaphragm area" , "Part of body between waist and chest" , "Region between chest and waist" , "Area between stomach and chest" .)

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