Recently finished stamp collecting (6)
I believe the answer is:
lately
'recently' is the definition.
('lately' can be a synonym of 'recently')
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for lately that I've seen before include "Recently" , "Not long ago, in recent times" , "Not long ago, sounds unpunctual" , "Within recent time" , "In the last few days" .)