Solid verb forms for flyers (9)
I believe the answer is:
lovebirds
'for flyers' is the definition.
(birds fly)
'solid verb forms' is the wordplay.
'forms' indicates an anagram.
'solid'+'verb'='solidverb'
'solidverb' anagrammed gives 'LOVEBIRDS'.
(Other definitions for lovebirds that I've seen before include "Affectionate parrots" , "Small African parrots or romantic couples" , "Small African parrots or romantic couple" .)