The most common and most likely answer to this crossword clue is the 6 letter word EROTIC
I've seen this crossword clue in The Guardian
E
R
O
T
I
C
More clues leading to the result EROTIC
- Fine arresting extremes of opulent love poem
- Superhero, tickled, keeps arousing excitement
- Sexy thing breaking heart with rejection
- Sexy books found in Morecambe?
- For rousing passion, unfinished symphony by Beethoven eclipses his fourth
- Old Testament filling American’s heart regarding sex
- It’s stimulating to be back in Eric’s embrace
- A left ear — and ear’s sexy!
- Naughty champion, hiding head, twitching
- Man grabs old books designed to titillate
Buddy explains!

The straight part
We know that "It’s stimulating" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case it’s stimulating = erotic.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 EROTIC mean?
EROTIC noun- An amorous composition or poem.
- Relating to or tending to arouse sexual desire or excitement.