The most common and most likely answer to this crossword clue is the 7 letter word THEOREM
T
H
E
O
R
E
M
More clues leading to the result THEOREM
- Boy fronting pupils’ moving proposition
- Article with more unusual proposition
- The male carrying gold to sweetheart makes aproposition
- Proposition boy soldiers misunderstood at first
- Article associated with more complex proposition
- Yours truly repelled by the golden rule
- Proposition made by Greek boy concerning end of term?
- Proposition earth mother prepared to embrace
- Proposition made by Greek boy band?
- Scientific statement the more complicated
Buddy explains!

The straight part
We know that "Proposition" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case proposition = theorem.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 THEOREM mean?
THEOREM noun- A mathematical statement of some importance that has been proven to be true. Minor theorems are often called propositions. Theorems which are not very interesting in themselves but are an essential part of a bigger theorem's proof are called lemmas.
- A mathematical statement that is expected to be true
- A syntactically correct expression that is deducible from the given axioms of a deductive system.
- To formulate into a theorem.