Keeping an eye on caseworker working as a barman not directly involved (8,5)
I believe the answer is:
watching brief
'a barman not directly involved' is the definition.
I don't know anything about this answer so I can't tell whether this works.
'keeping an eye on caseworker working' is the wordplay.
'keeping an eye on' becomes 'watching' ('watch' can be a synonym of 'keep an eye on').
'caseworker working' becomes 'brief' (I am not sure about this - if you are sure you should believe this answer much more).
'watching'+'brief'='WATCHING BRIEF'
'as' is the link.
Can you help me to learn more?
(Other definitions for watching brief that I've seen before include "observational responsibility" , "Duty to observe" .)