The most common and most likely answer to this crossword clue is the 6 letter word THESIS
T
H
E
S
I
S
More clues leading to the result THESIS
- Dissertation provided by one of the siblings?
- Statement from UK spying agency
- Unproved statement in article, relative
- Unproved statement in submission for PhD?
- Dissertation not say in essay, described with what we have here
- Essay is written on the first of September
- Unproved premise in article so idealistic, silly first of all
- He sits composing dissertation
- Stay up penning the man’s dissertation
- Position article next to little sibling
Buddy explains!

The straight part
We know that "P" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case p = thesis.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 THESIS mean?
THESIS noun- Senses relating to logic, rhetoric, etc.
- Senses relating to music and prosody.