Workers with plugs brought about repairs (6)
I believe the answer is:
amends
'workers with plugs brought' is the definition.
I can't tell whether this definition defines the answer.
'about repairs' is the wordplay.
'about' becomes 'a' (abbreviation in Chambers).
'repairs' becomes 'mends' ('mend' can be a synonym of 'repair').
'a'+'mends'='AMENDS'
(Other definitions for amends that I've seen before include "It is made in reparation" , "Make them to compensate" , "Alters, makes right" , "Makes minor improvements" , "Make these to atone for injuries or loss caused" .)