Hope portion of stew is hot (4)
I believe the answer is:
wish
'hope' is the definition.
(thesaurus)
'portion of stew is hot' is the wordplay.
'portion of' indicates a hidden word.
'WISH' is hidden within 'stew is hot'.
(Other definitions for wish that I've seen before include "Want (to do something)" , "Express a desire (upon a star?)" , "Something desired" , "Desire, hope" , "prayer" .)