Communications taking a long time to get to army room? (8)
I believe the answer is:
messages
'communications' is the definition.
(message is a kind of communication)
'a long time to get to army room?' is the wordplay.
'a long time' becomes 'ages' (ages can mean a very long time).
'to get' says to put letters next to each other.
'to army room?' becomes 'mess' (I can't justify this - if you can you should give a lot more credence to this answer).
'ages' put after 'mess' is 'MESSAGES'.
'taking' is the link.
Can you help me to learn more?
(Other definitions for messages that I've seen before include "Notes" , "teachings" , "Pieces of information carried from one person to another" , "Shopping up north" , "Communications, written, spoken or signalled" .)