One getting free case loaded with game meat (12)
I believe the answer is:
escapologist
'one getting free' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'case loaded with game meat' is the wordplay.
I cannot really understand how this works, but
an anagram of 'case' is 'esca' which is located in the answer.
'game' could be 'polo' (polo is a kind of game) and 'polo' is found in the answer.
'meat' could be 'gist' (synonyms) and 'gist' is present in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for escapologist that I've seen before include "chap who's becoming unrestrained?" , "Eg, Harry Houdini" , "Entertainer getting free from constraints" , "Houdini's trade" , "Entertainer skilled at getting free from confinement" .)