Got together in time, tardily (3)
I believe the answer is:
met
'got together' is the definition.
('meet' can be a synonym of 'get together')
'in time tardily' is the wordplay.
'in' says the answer is hidden in the clue.
'MET' is hidden within 'time tardily'.
(Other definitions for met that I've seen before include "Encountered pro tem" , "Encountered by chance or arrangement" , "Came across - police in London" , "Opera company" , "satisfied" .)