The whole Red Centre forced outside northern dance (9)
I believe the answer is:
allemande
'dance' is the definition.
(I've seen this before)
'the whole red centre forced outside northern' is the wordplay.
'the whole' becomes 'all' (all of something).
'red centre' becomes 'edna' (I can't explain this - if you can you should believe this answer much more).
'forced' becomes 'made' (both can mean coerced).
'outside' suggests removing the centre.
'northern' says the letters should be written in reverse (in a down clue, letters go up or 'north').
'made' with its middle removed is 'me'.
'edna'+'me'='edname'
'edname' in reverse letter order is 'emande'.
'all'+'emande'='ALLEMANDE'
Can you help me to learn more?
(Other definitions for allemande that I've seen before include "dance tune" , "German dance" .)