The most common and most likely answer to this crossword clue is the 12 letter word DECISIVENESS
I've seen this crossword clue in The Times
D
E
C
I
S
I
V
E
N
E
S
S
Buddy explains!
The straight part
We know that "ability to resolve issues" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case ability to resolve issues = decisiveness.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.
Crossword Answer definitions
DECISIVENESS noun- The state or quality of being decisive.