The most common and most likely answer to this crossword clue is the 4 plus 5 letter word DEEP FRIED
I've seen this crossword clue in The Times
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More clues leading to the result DEEP FRIED
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The straight part
We know that "like some Glasgow chocolate bars?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case like some glasgow chocolate bars? = deep fried.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.
Crossword Answer definitions
DEEP FRIED adjective- Of food, cooked in a deep fryer, typically after being coated in batter.
- To cook (food) by deep-frying.