Strike idiot in neck and face in scrap (4,5)
I believe the answer is:
down tools
'strike idiot' is the definition.
'down tools' can be an answer for 'strike' (to down tools is to stop working and strike). I am not certain of the 'idiot' bit.
'neck and face in scrap' is the wordplay.
'neck' becomes 'down' (both can mean to swallow or drink quickly).
'and' is a charade indicator (letters next to each other).
'face in scrap' becomes 'tools' (I am not sure about this - if you are sure you should believe this answer much more).
'down'+'tools'='DOWN TOOLS'
'in' is the link.
Can you help me to learn more?
(Other definitions for down tools that I've seen before include "Stop work; strike" , "go on strike" , "Take industrial action" .)