The most common and most likely answer to this crossword clue is the 7 letter word ANATOMY
A
N
A
T
O
M
Y
More clues leading to the result ANATOMY
- Structure of an alliance that surprises me
- Physique some must cover a little bit
- First-rate international body supervises my study
- Physical structure of a defensive alliance: goodness!
- Tiny part in any field of study
- Science a little bit grisly, ultimately
- Little bit inspired by some science
- Science of a particle with variable
- Particle in some science
- Tiny thing in some branch of science
Buddy explains!

The straight part
We know that "branch of science" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case branch of science = anatomy.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 ANATOMY mean?
ANATOMY noun- The art of studying the different parts of any organized body, to discover their situation, structure, and economy.
- The science that deals with the form and structure of organic bodies; anatomical structure or organization.
- A treatise or book on anatomy.
- (by extension) The act of dividing anything, corporeal or intellectual, for the purpose of examining its parts.
- The form of an individual.
- The human body, especially in reference to the private parts.
- A skeleton, or dead body.
- The physical or functional organization of an organism, or part of it.