Finally, time to support a titan (2,4)
I believe the answer is:
at last
'finally' is the definition.
(synonyms)
'time to support a titan' is the wordplay.
'time' becomes 't' (abbreviation).
'to support' is a charade indicator (letters next to each other) (in a down clue, some letters hold others up).
'a titan' becomes 'atlas' (Atlas is an example).
't' after 'atlas' is 'AT LAST'.
(Other definitions for at last that I've seen before include "Where a snob worked" , "Finally, having waited a long time" , "Finally, after much delay" , "Where cobbler located" , "Eventually" .)