The most common and most likely answer to this crossword clue is the 3 plus 2 plus 2 plus 7 letter word PIG IN Â A BLANKET
P
I
G
I
N
Â
A
B
L
A
N
K
E
T
Buddy explains!
The straight part
We know that "Hot dog" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case hot dog = pig in  a blanket.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.