Slip from circuit, set incomplete (5)
I believe the answer is:
lapse
'slip' is the definition.
(I know that lapse is a type of slip)
'circuit set incomplete' is the wordplay.
'circuit' becomes 'lap' (synonyms).
'incomplete' means to remove the last letter.
'set' with its final letter taken away is 'se'.
'lap'+'se'='LAPSE'
'from' acts as a link.
(Other definitions for lapse that I've seen before include "Slip-up" , "Slip, error" , "Passing - mistake" , "Retrogress" , "Error; oversight" .)