Award two silver medals maybe for a brief period? (5,6)
I believe the answer is:
split second
'for a brief period?' is the definition.
(short period of time)
'award two silver medals' is the wordplay.
I cannot really understand how this works, but
'silver' could be 'second' (I've seen this before) and 'second' is located in the answer.
The remaining letters 'split' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'maybe' acts as a link.
(Other definitions for split second that I've seen before include "An extremely short time" , "Very brief moment of time" , "Twinkling of an eye" , "Instant" , "Very little time" .)