The most common and most likely answer to this crossword clue is the 14 letter word IMPLEMENTATION
I've seen this crossword clue in The Daily Telegraph
I
M
P
L
E
M
E
N
T
A
T
I
O
N
More clues leading to the result IMPLEMENTATION
Buddy explains!
The straight part
We know that "Carrying out" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case carrying out = implementation.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 IMPLEMENTATION mean?
IMPLEMENTATION noun- The process of moving an idea from concept to reality. In business, engineering and other fields, implementation refers to the building process rather than the design process.
- A result of implementing something; a finished product, system or device.