Fatheaded fibs from 'pilots' (5)
I believe the answer is:
flies
'pilots' is the definition.
('fly' can be a synonym of 'pilot')
'fatheaded fibs' is the wordplay.
'fatheaded' becomes 'f' (this could be a standard abbreviation I've not previously seen).
'fibs' becomes 'lies' (informal term for lies).
'f'+'lies'='FLIES'
'from' acts as a link.
Can you help me to learn more?
(Other definitions for flies that I've seen before include "Insects; passes swiftly" , "Insects; goes quickly" , "Trouser zip area -- travels through the air" .)