The most common and most likely answer to this crossword clue is the 7 plus 2 plus 5 letter word PORTION OF CHIPS
I've seen this crossword clue in The Guardian
P
O
R
T
I
O
N
O
F
C
H
I
P
S
Buddy explains!
The straight part
We know that "that’s traditionally found in newspaper" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case that’s traditionally found in newspaper = portion of chips.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.