Unemployed CID officers meeting American press chief (7)
I believe the answer is:
disused
'unemployed' is the definition.
'cid officers meeting american press chief' is the wordplay.
'cid officers' becomes 'dis' (I am not sure about this - if you are sure you should believe this answer much more).
'meeting' is a charade indicator (letters next to each other).
'american' becomes 'us' (abbreviation for United States).
'press chief' becomes 'ed' (I've seen this in other clues).
'dis'+'us'+'ed'='DISUSED'
Can you help me to learn more?
(Other definitions for disused that I've seen before include "No longer operated" , "No longer in action" , "empty" , "Idle" , "No longer of service" .)