The most common and most likely answer to this crossword clue is the 11 letter word MEASUREMENT
M
E
A
S
U
R
E
M
E
N
T
More clues leading to the result MEASUREMENT
- Evaluation made by certain people in essence
- Size of solid pieces, in essence
- Beef perhaps about certain chaps’ size
- Weighing of certain hands in game
- Size of certain guys covered in flesh
- Capacity of certain players in the new team
- A tape recording?
- Bond’s boss weirdly enumerates dimension
- Survey of certain males in Turkey, say
Buddy explains!

The straight part
We know that "Size" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case size = measurement.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 MEASUREMENT mean?
MEASUREMENT noun- The act of measuring.
- Magnitude (or extent or amount) determined by an act of measuring.