Jeff and Beau's dad (5)
I believe the answer is:
lloyd
'jeff and beau's dad' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lloyd that I've seen before include "David - George, British PM nineteen sixteen to nineteen twenty two" , "Frank -- Wright, US architect" , "Harold - - , silent comic" , "Bridges perhaps" , "Welsh family name" .)