The most common and most likely answer to this crossword clue is the 8 letter word STRUMPET
I've seen this crossword clue in The Guardian
S
T
R
U
M
P
E
T
More clues leading to the result STRUMPET
- Call girl to play idly with dog, say
- Tart shop’s beginning to advertise
- Place outside better for working girl
- Scarlet woman‘s in position, Mr President
- Immoral woman in group entertaining president
- A tart prepared to straddle world leader!
- Actress ultimately given daffy part as tramp
- Pro‘s small instrument
- Disreputable woman‘s group welcomes Donald
- Set about 30 8 of 18 3?
Buddy explains!

The straight part
We know that "tramp" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case tramp = strumpet.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 STRUMPET mean?
STRUMPET noun- A female prostitute
- A woman who is very sexually active.
- A female adulterer.
- A mistress.
- A trollop; a whore.
- To debauch.
- To dishonour with the reputation of being a strumpet; to belie; to slander.