Crossword Genius

Listen to this marine group start fishing (7)

Ross

I believe the answer is:

podcast

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

'listen to' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'marine group start fishing' is the wordplay.
'marine group' becomes 'pod' (I am not sure about this - if you are sure you should believe this answer much more).
'start fishing' becomes 'cast' (I've seen this in another clue).
'pod'+'cast'='PODCAST'

'this' is the link.

Can you help me to learn more?

(Other definitions for podcast that I've seen before include "Audio file distributed over the internet" , "internet feature" , "Downloadable multimedia file" , "Distribute file(s) via internet to personal computers for playback" , "digital recording" .)

I've seen this clue in The Times.
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