The most common and most likely answer to this crossword clue is the 6 plus 3 letter word BOMBAY MIX
I've seen this crossword clue in Financial Times
B
O
M
B
A
Y
M
I
X
More clues leading to the result BOMBAY MIX
Buddy explains!

The straight part
We know that "spicy stuff" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case spicy stuff = bombay mix.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.