Drained Tyson Fury got up on the throne (7)
I believe the answer is:
regnant
'on the throne' is the definition.
(I've seen this before)
'drained tyson fury got up' is the wordplay.
'drained' suggests removing the centre.
'fury' becomes 'anger' (fury is intense anger).
'got up' shows that the letters should be reversed in order.
'tyson' with its middle removed is 'tn'.
'tn'+'anger'='tnanger'
'tnanger' in reverse letter order is 'REGNANT'.
(Other definitions for regnant that I've seen before include "Ruling" , "Current" , "Reigning" , "On the throne" , "(Queen) in her own right" .)