Some detest a steak's flavour (5)
I believe the answer is:
taste
'flavour' is the definition.
(I've seen this before)
'some detest a steak's' is the wordplay.
'some' indicates the answer is hidden within the clue (some parts of the word are used).
'TASTE' is hidden within 'detest a steaks'.
(Other definitions for taste that I've seen before include "Show sense" , "Sensation of flavour" , "Take mouthful" , "Sip" , "Sample - discrimination" .)