The most common and most likely answer to this crossword clue is the 4 plus 1 plus 3 plus 3 plus 5 plus 3 plus 4 letter word MAKE A ROD FOR ONE'S OWN BACK
M
A
K
E
A
R
O
D
F
O
R
O
N
E
'
S
O
W
N
B
A
C
K
Buddy explains!
The straight part
We know that "Ask for trouble" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case ask for trouble = make a rod for one's own back.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.