Regiment in battle drama that’s broadcast repeatedly (6,6)
I believe the answer is:
action replay
'regiment' is the definition.
Both the answer and definition are singular nouns.
Perhaps there's an association between them I don't understand?
'in battle drama that's broadcast repeatedly' is the wordplay.
'in' is an insertion indicator.
'battle' becomes 'action' (military action).
'drama' becomes 'play' (synonyms).
'that's broadcast repeatedly' becomes 're' (I am not sure about this - if you are sure you should believe this answer much more).
'action'+'play'='actionplay'
'actionplay' placed around 're' is 'ACTION REPLAY'.
Can you help me to learn more?
(Other definitions for action replay that I've seen before include "item in sports programme" , "Re-run on TV of section of sporting event" .)