The most common and most likely answer to this crossword clue is the 7 letter word SPICIER
I've seen this crossword clue in The Daily Telegraph
S
P
I
C
I
E
R
More clues leading to the result SPICIER
Buddy explains!

The straight part
We know that "Raunchier" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case raunchier = spicier.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 SPICIER mean?
SPICIER adjective- Of, pertaining to, or containing spice.
- (of flavors) Provoking a burning sensation due to the presence of chilis or similar hot spices
- (of flavors or odors) Tangy, zesty, or pungent.
- (of expression or behavior) Vigorous; colorful; stimulating.
- Risqué, sexy, racy; mildly pornographic.