He stops to interfere (6)
I believe the answer is:
tamper
'interfere' is the definition.
(I know that tamper is a type of interfere)
'he stops' is the wordplay.
I cannot quite see how this works, but
'he' could be 'tam' and 'tam' is present in the answer.
The remaining letters 'per' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'to' is the link.
Can you help me to learn more?
(Other definitions for tamper that I've seen before include "Machine for compacting earth; interfere (with)" , "Mess damagingly (with)" , "Interfere (with a thing)" , "Destructively interfere (with)" , "Alter or falsify, evidence perhaps" .)