The most common and most likely answer to this crossword clue is the 9 letter word TOP-HEAVY
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More clues leading to the result TOP-HEAVY
Buddy explains!

The straight part
We know that "descriptive of Dolly (Parton)" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case descriptive of dolly (parton) = top-heavy.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.
What does TOP-HEAVY mean?
TOP-HEAVY adjective- Having a high centre of gravity, and liable to topple
- (of an organization) having an excessive number of administrators or managers
- (of a retirement plan) Having a significant portion of the plan assets allocated to key employees to the detriment of lower-wage employees.
- (of a person, typically a woman) having a disproportionately large upper body, especially the bust