Greek character some maybe tamed (4)
I believe the answer is:
beta
'greek character' is the definition.
(letter from the Greek alphabet)
'some maybe tamed' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'BETA' is hidden in the letters of 'maybe tamed'.
(Other definitions for beta that I've seen before include "Greek character - not quite top-notch" , "Second Greek letter, B" , "Old character" , "Second Greek letter - beat that" , "testing stage" .)