Sample that a steward conceals (5)
I believe the answer is:
taste
'sample' is the definition.
(I know that sample can be written as taste)
'that a steward conceals' is the wordplay.
'conceals' indicates a hidden word.
'TASTE' is hidden in the letters of 'that a steward'.
(Other definitions for taste that I've seen before include "Smack" , "Take mouthful" , "Savour, relish" , "Sensation in the mouth caused by food" , "Sensation of flavour" .)