Obviously young support liberal revolt (7)
I believe the answer is:
overtly
'obviously' is the definition.
(I've seen this before)
'young support liberal revolt' is the wordplay.
'young' becomes 'y'.
'support' is a charade indicator (letters next to each other) (in a down clue, some letters hold others up).
'liberal' indicates anagramming the letters.
'revolt' anagrammed gives 'overtl'.
'y' put after 'overtl' is 'OVERTLY'.
(Other definitions for overtly that I've seen before include "clearly!" , "no attempt at concealment" , "So that anyone can see" , "Observably, not hidden" , "public fashion" .)