The most common and most likely answer to this crossword clue is the 7 letter word BLISTER
I've seen this crossword clue in The Times
B
L
I
S
T
E
R
More clues leading to the result BLISTER
- Footsore person of second celebrity group?
- Spot someone not quite in the top level of society?
- Minor celeb's sore?
- One not that famous in a painful spot
- Bubble that irritates second-rate movie star?
- Result of friction caused by second rate celebrity?
- Skin problem requiring British surgeon
- Second-rate celeb is a nuisance
- Maybe second-rate celebrity in bubble?
- Second-rate celebrity is a pest
Buddy explains!

The straight part
We know that "a painful spot" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a painful spot = blister.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 BLISTER mean?
BLISTER noun- A small bubble between the layers of the skin that contains watery or bloody fluid and is caused by friction and pressure, burning, freezing, chemical irritation, disease or infection.
- A swelling on a plant.
- Something applied to the skin to raise a blister; a vesicatory or other applied medicine.
- A bubble, as on a painted surface.
- (roofing) An enclosed pocket of air, which may be mixed with water or solvent vapor, trapped between impermeable layers of felt or between the membrane and substrate.
- A type of pre-formed packaging made from plastic that contains cavities.
- A cause of annoyance
- To raise blisters on.
- To have a blister form.
- To criticise severely.
- To break out in blisters.