Socialist and German worker are no longer required (9)
I believe the answer is:
redundant
'no longer required' is the definition.
The answer and definition are not the same part of speech. However, adjectives and past participle verbs can sometimes mean the same thing.
'socialist and german worker' is the wordplay.
'socialist' becomes 'red' (socialism is often associated with the colour red).
'and german' becomes 'und' ('and' in German).
'worker' becomes 'ant' (worker is a type of ant).
'red'+'und'+'ant'='REDUNDANT'
'are' acts as a link.
Can you help me to learn more?
(Other definitions for redundant that I've seen before include "unwanted" , "No longer necessary" , "No longer useful" , "out of a job" , "excessive?" .)