Subject to change, bilateral art removed (6)
I believe the answer is:
liable
'subject to' is the definition.
(I've seen this before)
'change bilateral art removed' is the wordplay.
'change' indicates an anagram.
'removed' suggests deleting specific letters.
'bilateral' with 'art' taken away is 'bileal'.
'bileal' anagrammed gives 'LIABLE'.
(Other definitions for liable that I've seen before include "Likely" , "Exposed to risk" , "Apt to" , "To blame" , "Subject to an obligation" .)