Read aloud basic flier (5)
I believe the answer is:
plane
'flier' is the definition.
(planes fly)
'read aloud basic' is the wordplay.
'read aloud' indicates a 'sounds like' (homophone) clue.
'basic' becomes 'plain' (both can mean simple).
'plain' sounds like 'PLANE'.
(Other definitions for plane that I've seen before include "barked?" , "What imitates bird" , "Woodworking tool" , "Form of transport" , "Tool for smoothing wood" .)