Dogged dog chased Charles away (7)

I believe the answer is:

hounded

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'dogged' is the definition.
(hounding is a kind of dogging)

'dog chased charles away' is the wordplay.
'dog' becomes 'hound' (synonyms).
'chased charles away' becomes 'ed' (I can't justify this - if you can you should give a lot more credence to this answer).
'hound'+'ed'='HOUNDED'

Can you help me to learn more?

(Other definitions for hounded that I've seen before include "Badgered" , "harassed" , "Dogged" .)

I've seen this clue in The Sun.

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