Harry gets one over on solver regularly (6)
I believe the answer is:
hassle
'harry' is the definition.
(I know that harry can be written as hassle)
'one over on solver regularly' is the wordplay.
'one over on' becomes 'has' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
The alternating letters of 'solver' are 'sle'.
'has'+'sle'='HASSLE'
'gets' acts as a link.
Can you help me to learn more?
(Other definitions for hassle that I've seen before include "Bother, fuss" , "Colloquial harassment or annoyance" , "Informally annoy or bother" , "Informally, annoy or harass" , "Pester (colloq.)" .)