Free ticket for all to see amid revised terms gets to appear adequate (4,6)
I believe the answer is:
pass muster
'to appear adequate' is the definition.
(to pass muster is to be good enough)
'free ticket for all to see amid revised terms' is the wordplay.
'free ticket' becomes 'pass ' (I've seen this in another clue).
'for all to see' becomes 'u' (short for Universal film certificate).
'amid' means one lot of letters goes inside another.
'revised' indicates anagramming the letters.
'terms' anagrammed gives 'mster'.
'u' placed inside 'mster' is 'muster'.
'pass'+'muster'='PASS MUSTER'
'gets' is the link.
(Other definitions for pass muster that I've seen before include "Satisfy, suffice" , "To fit the bill" , "Be good enough" , "appear acceptable" .)