Upset mind originally entertained by stance adopted by John Travolta? (10)
I believe the answer is:
discompose
'upset' is the definition.
(synonyms)
'mind originally entertained by stance adopted by john travolta?' is the wordplay.
'originally' indicates taking the first letters.
'entertained by' indicates putting letters inside (I've seen this in other clues).
'stance adopted by john travolta?' becomes 'discopose'.
The initial letter of 'mind' is 'm'.
'm' placed within 'discopose' is 'DISCOMPOSE'.
(Other definitions for discompose that I've seen before include "Unsettle" , "Rattle?" .)