The most common and most likely answer to this crossword clue is the 7 letter word BUTTONS
I've seen this crossword clue in The Daily Telegraph
B
U
T
T
O
N
S
More clues leading to the result BUTTONS
- However many knobs
- Bar with a great deal: they don’t cost much
- Pageboy has container of stuff picked up
- Fastens bottom on top of seat
- On filling casks, press these for attention
- Tips to collect working for peanuts
- Panto character putting bum on seat, no worry
- Container inverted over many a pantomime character
- Page in script of Cinderella
- Pantomime character, stooge on stage at the start
Buddy explains!

The straight part
We know that "pantomime character" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case pantomime character = buttons.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 BUTTONS mean?
BUTTONS noun- One who adjusts, especially for the insurance industry's employment title "loss adjuster" (or "claims adjuster" in the United States).
- A knob or disc that is passed through a loop or (buttonhole), serving as a fastener.
- A mechanical device meant to be pressed with a finger in order to open or close an electric circuit or to activate a mechanism.
- An on-screen control that can be selected as an activator of an attached function.
- A badge worn on clothes, fixed with a pin through the fabric.
- A bud.
- The head of an unexpanded mushroom.
- The clitoris.
- The center (bullseye) of the house.
- The soft circular tip at the end of a foil.
- A plastic disk used to represent the person in last position in a poker game; also dealer's button.
- The player who is last to act after the flop, turn and river, who possesses the button.
- A person who acts as a decoy.
- A raised pavement marker to further indicate the presence of a pavement marking painted stripe.
- A methaqualone tablet (used as a recreational drug).
- A piece of wood or metal, usually flat and elongated, turning on a nail or screw, to fasten something, such as a door.
- A globule of metal remaining on an assay cupel or in a crucible, after fusion.
- A knob; a small ball; a small, roundish mass.
- A small white blotch on a cat's coat.
- A unit of length equal to 1/12 inch.
- The means for initiating a nuclear strike or similar cataclysmic occurrence.
- In an instrument of the violin family, the near-semicircular shape extending from the top of the back plate of the instrument, meeting the heel of the neck.
- The least amount of care or interest; a whit or jot.
- The final joke at the end of a comedic act (such as a sketch, set, or scene).
- A button man; a professional assassin.
- The final segment of a rattlesnake's rattle.
- To fasten with a button.
- To be fastened by a button or buttons.
- To stop talking.
- The dung of sheep.
- A remote control.
- A boy servant, or page.
- A policeman.
- In a violin-family instrument, the carved wooden plug which sits in the bottom block of the instrument.