Crossword Genius

Type of pitch popular with all sides today (4)

Ross

I believe the answer is:

rock

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'type of pitch' is the definition.

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for rock that I've seen before include "Stagger" , "Seaside confectionery" , "wobble" , "Boulder - oscillate - sweetmeat" , "8 - -" .)

I've seen this clue in the Irish Times and the Irish Times (Crosaire).
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