Supporter's big steak sent round
I believe the answer is:
thighbone
'supporter's' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'big steak sent round' is the wordplay.
'big' becomes 'high' (synonyms).
'steak' becomes 't-bone' (T-bone steak is an example).
'sent round' is an insertion indicator.
'high' put into 'tbone' is 'THIGHBONE'.
Can you help me to learn more?
(Other definitions for thighbone that I've seen before include "The informal femur" , "Section of frame" .)