Crossword Genius

Tape caught a second dog beginning to run off (8)

Ross

I believe the answer is:

cassette

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

'tape' is the definition.
(I know that tape can be written as cassette)

'caught a second dog beginning to run off' is the wordplay.
I cannot really see how this works, but
'caught' could be 'c' (cricket abbreviation) and 'c' is present in the answer.
'a' is found in the answer.
'second' could be 's' (common abbreviation) and 's' is located in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for cassette that I've seen before include "Container that holds a magnetic tape" , "Audio tape holder" , "Test case about tape container" , "Recording medium" , "Music tape" .)

I've seen this clue in The Telegraph.
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