Send down reel about entrance (8)
I believe the answer is:
relegate
'send down' is the definition.
(I've seen this before)
'reel about entrance' is the wordplay.
'about' indicates anagramming the letters.
'entrance' becomes 'gate' (type of entrance).
'reel' anagrammed gives 'rele'.
'rele'+'gate'='RELEGATE'
(Other definitions for relegate that I've seen before include "Transfer to a lower division" , "Consign to less important place - maybe a soccer team" , "Assign to a lower position" , "Move down to a lower grade" , "Send down" .)