Repeatedly like this disliked person (7)
I believe the answer is:
soandso
'repeatedly' is the definition.
I know nothing about this answer so I cannot judge whether this works.
'like this disliked person' is the wordplay.
'like this' becomes 'so' ('like so').
'disliked person' becomes 'andso' (I can't explain this - if you can you should give a lot more credence to this answer).
'so'+'andso'='SOANDSO'
Can you help me to learn more?
(Another definition for soandso that I've seen is " Unpleasant person - whose name has been forgotten!".)