The most common and most likely answer to this crossword clue is the 8 letter word CONTENTS
I've seen this crossword clue in The Daily Telegraph
C
O
N
T
E
N
T
S
More clues leading to the result CONTENTS
Buddy explains!
The straight part
We know that "Satisfies/all within" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case satisfies/all within = contents.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 CONTENTS mean?
CONTENTS verb- To give contentment or satisfaction; to satisfy; to make happy.
- To satisfy the expectations of; to pay; to requite
- That which is contained.
- Subject matter; that which is contained in writing or speech.
- The amount of material contained; contents
- Capacity for holding
- The n-dimensional space contained by an n-dimensional polytope (called volume in the case of a polyhedron and area in the case of a polygon)
- (of a polynomial with coefficients in a GCD domain) the greatest common divisor of the coefficients; (of a polynomial with coefficients in an integral domain) the common factor of the coefficients which, when removed, leaves the adjusted coefficients with no common factor that is noninvertible
- Satisfaction; contentment.
- Acquiescence without examination
- That which contents or satisfies; that which if attained would make one happy.
- (House of Lords) an expression of assent to a bill or motion; an affirmate vote
- (House of Lords) a member who votes in assent
- (usually in the plural) That which is contained.
- A table of contents, a list of chapters, etc. in a book, and the page numbers on which they start.