Very tired, though it’s late, be at (4,4)
I believe the answer is:
dead beat
'very tired though' is the definition.
I can't tell whether this defines the answer.
'late be at' is the wordplay.
'late' becomes 'dead' (similar in meaning).
'dead'+'be'+'at'='DEAD-BEAT'
'it's' is the link.
Can you help me to learn more?
(Other definitions for dead beat that I've seen before include "Exhausted ? useless person" , "Lazy, useless person" , "Informally a down-and-out" , "Completely exhausted (colloq.)" , "Tired out" .)