Here are the possible solutions for having a diagonal direction clue
Answer
Clue
Relevancy
slanted
Clue
Having a diagonal direction
goright
Clue
Direction giver's direction
zaynmalik
Clue
One Direction member who went in another direction
One Direction member who decided to take his career in another...hehe...direction
abe
Clue
Nickname of the man (born 2/12/1809) who gave the address at 18A, issued the 28A/45A, was the first elected president of the 60A Party, and whose name can be found in this puzzle's main diagonal
area
Clue
In a rhombus, half the product of its diagonal lengths