Pesters like a pup, hounding a patsy? (4,2)

I believe the answer is:

yaps at

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'pesters' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'a pup hounding a patsy?' is the wordplay.
'a patsy' anagrams to 'YAPS AT'.
Though, I'm not clear how the anagram is indicated.

'like' is the link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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