The most common and most likely answer to this crossword clue is the 12 letter word CONSERVATIVE
I've seen this crossword clue in Financial Times
C
O
N
S
E
R
V
A
T
I
V
E
More clues leading to the result CONSERVATIVE
- Blue square
- Tory vote caves in unexpectedly: Labour at last gets in
- Cautious — vet one’s vicar? Strange!
- Revolutionary, not vice-versa? Not revolutionary at all!
- Veto, craven, is represented as averse to change
- Traditional voters cave in, unfortunately
- Wrong — vice versa, not right
- Fellow accommodating illicit tavern is party guy?
- Blue container inside oven’s loaded with rice
Buddy explains!

The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does CONSERVATIVE mean?
CONSERVATIVE noun- A person who favors maintenance of the status quo.
- Cautious.
- Tending to resist change or innovation.
- Based on pessimistic assumptions.
- Supporting some combination of fiscal, political or social conservatism.
- Relating to the Conservative Party.
- Neither creating nor destroying a given quantity.
- Having power to preserve in a safe or entire state, or from loss, waste, or injury; preservative.
- Relating to Conservative Judaism.
- (clothing) Conventional, traditional, and moderate in style and appearance; not extreme, excessive, faddish, or intense.
- Not including any operation or intervention (said of a treatment, see conservative treatment)