Language employed by Sheraton guest (6)
I believe the answer is:
tongue
'language' is the definition.
(tongue can mean a language)
'employed by sheraton guest' is the wordplay.
'employed by' says the answer is hidden in the clue.
'TONGUE' can be found hidden inside 'sheraton guest'.
(Other definitions for tongue that I've seen before include "They are hard to say" , "Speech" , "dialect" , "Mouth organ; language" , "Flap under shoelaces" .)