Complained about me interrupting dental working (8)
I believe the answer is:
lamented
'complained' is the definition.
(lamenting is a kind of complaining)
'me interrupting dental working' is the wordplay.
'interrupting' is an insertion indicator.
'working' indicates an anagram.
'dental' anagrammed gives 'lanted'.
'me' put within 'lanted' is 'LAMENTED'.
'about' is the link.
(Other definitions for lamented that I've seen before include "Mourned or grieved for" , "Mourned (a death)" , "Expressed disappointment about (something)" , "Bemoaned" , "Non compos mentis" .)