Time everyone finds hard to believe (4)
I believe the answer is:
tall
'hard to believe' is the definition.
(as in a tall tale)
'time everyone' is the wordplay.
'time' becomes 't' (abbreviation).
'everyone' becomes 'all' (all people).
't'+'all'='TALL'
'finds' acts as a link.
(Other definitions for tall that I've seen before include "Of great stature" , "Lofty; unlikely" , "hard to believe in" , "that's hard to swallow" , "Unbelievable" .)