Having finished twice, given a tip (7)
I believe the answer is:
upended
'given a tip' is the definition.
(to upend something is to tip it over)
'having finished twice' is the wordplay.
I cannot really understand how this works, but
'finished' could be 'ended' (similar in meaning) and 'ended' is present in the answer.
The remaining letters 'up' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for upended that I've seen before include "Capsized" , "Inverted" , "Turned upside down, topled" .)