Diversions, primarily — different routes (7)
I believe the answer is:
detours
'diversions primarily different routes' is the definition.
I can't tell whether this defines the answer.
'diversions primarily different routes' is the wordplay.
'primarily' says to take the initial letters.
'different' indicates anagramming the letters (letters placed in a different order).
The initial letter of 'diversions' is 'd'.
'routes' anagrammed gives 'etours'.
'd'+'etours'='DETOURS'
Can you help me to learn more?
(Another definition for detours that I've seen is " Temporary indirect routes".)