Meddle with tuner I'd repaired (7)
I believe the answer is:
intrude
'meddle' is the definition.
(I've seen this in another clue)
'with tuner i'd repaired' is the wordplay.
'with' means one lot of letters go next to another.
'repaired' indicates an anagram.
'tuner' next to 'id' is 'tunerid'.
'tunerid' with letters rearranged gives 'INTRUDE'.
(Other definitions for intrude that I've seen before include "Come in when not wanted" , "Push in unwantedly" , "Encroach on others' privacy" , "Pry" , "Gatecrash" .)