The most common and most likely answer to this crossword clue is the 9 letter word POMPADOUR
I've seen this crossword clue in The Times
P
O
M
P
A
D
O
U
R
More clues leading to the result POMPADOUR
- Mop up road spills in High Barnet
- Ceremony’s an austere do
- Display a forbidding array of locks
- Ritual with a morose style
- Englishman abroad every year with dreary old hairstyle
- Humourless politician with a stern style a bit like Trump’s?
- Typical whinger miserable about personal appearance in High Barnet
- Splendour pursued by a grim French mistress
- Ceremony requires a severe hairstyle
- Show a grim hairdo
Buddy explains!

The straight part
We know that "array of locks" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case array of locks = pompadour.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 POMPADOUR mean?
POMPADOUR noun- A women's hairstyle in which the hair is swept upwards from the face and worn high over the forehead.
- A men's hairstyle of the 1950s.
- A crimson or pink colour.
- A corsage with low square neck.
- A pattern for silk, with leaves and flowers in pink, blue, and gold.
- To style hair into a pompadour