Current stable employee covers bet (4)
I believe the answer is:
laid
'bet' is the definition.
(I've seen this in another clue)
'current stable employee covers' is the wordplay.
'current' becomes 'I' (symbol for electric current).
'stable employee' becomes 'lad' (lad can mean a stable lad).
'covers' means one lot of letters goes inside another.
'i' going into 'lad' is 'LAID'.
(Other definitions for laid that I've seen before include "tables may be?" , "Prepared (a trap)" , "The clutch must be" , "spread on a surface" , "(Of dining table) set" .)