The most common and most likely answer to this crossword clue is the 9 letter word CAREFULLY
C
A
R
E
F
U
L
L
Y
More clues leading to the result CAREFULLY
Buddy explains!
The straight part
We know that "Systematically" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case systematically = carefully.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 CAREFULLY mean?
CAREFULLY adverb- Sorrowfully.
- With care; attentively, circumspectly.