Worker joins in a band shouting angrily (7)
I believe the answer is:
ranting
'shouting angrily' is the definition.
The answer and definition can be both to do with communicating as well as being present participle verbs.
Maybe there's a link between them I don't understand?
'worker joins in a band' is the wordplay.
'worker joins' becomes 'ant' (I can't justify this - if you can you should believe this answer much more).
'in' indicates putting letters inside.
'a band' becomes 'ring' ('ring' can be a synonym of 'band').
'ant' put into 'ring' is 'RANTING'.
Can you help me to learn more?
(Other definitions for ranting that I've seen before include "Shouting wildly" , "Making a loud and angry speech" , "Raving, haranguing" .)