Insured flyer flies, not needing manual? (4-8)
I believe the answer is:
user-friendly
'not needing manual?' is the definition.
(straightforward enough that a manual is not needed)
'insured flyer flies' is the wordplay.
'flies' indicates an anagram.
'insured'+'flyer'='insuredflyer'
'insuredflyer' with letters rearranged gives 'USER-FRIENDLY'.
(Other definitions for user-friendly that I've seen before include "Easily picked up" , "Easy to understand or manipulate" , "Easy to operate" .)