Roads out of Canada's capital are long and straight (6)
I believe the answer is:
lances
'long and straight' is the definition.
I can't judge whether this defines the answer.
'roads out of canada's capital' is the wordplay.
'roads' becomes 'lanes' (I've seen this in other clues).
'out of' indicates putting letters inside (some letters on the outside of others).
'capital' says to take the initial letters.
The first letter of 'canadas' is 'c'.
'lanes' placed around 'c' is 'LANCES'.
'are' is the link.
Can you help me to learn more?
(Other definitions for lances that I've seen before include "Spears for cavalrymen" , "Spears for horse soldiers" , "Long pointed weapons" .)