Part of layover's awfully managed (7)
I believe the answer is:
oversaw
'managed' is the definition.
('oversee' can be a synonym of 'manage')
'part of layover's awfully' is the wordplay.
'part of' indicates a hidden word.
'OVERSAW' is hidden within 'layovers awfully'.
(Other definitions for oversaw that I've seen before include "watcher" , "Supervised" , "Managed" , "What supervisor did" .)