Drag rocket around - he will follow its scent (7,3)

I believe the answer is:

tracker dog

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'he will follow its scent' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'drag rocket around' is the wordplay.
'around' is an anagram indicator.
'drag'+'rocket'='dragrocket'
'dragrocket' is an anagram of 'TRACKER DOG'.

Can you help me to learn more?

I've seen this clue in The Irish Times.

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