What may be heard from pit crosses Olympic colosseum (7)

I believe the answer is:

piccolo

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'what may be heard' is the definition.
I can't tell whether this defines the answer.

'pit crosses olympic colosseum' is the wordplay.
'PICCOLO' is hidden within the letters.
However, I am not sure how this is indicated.

'from' is the link.

Can you help me to learn more?

(Other definitions for piccolo that I've seen before include "Little flute" , "Part of 14 [ORCESTRA]" , "High wind instrument" , "producer of note" , "Smallest of the flute family" .)

I've seen this clue in The Times.

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