Second prize for Mr Dave Ellis in the medley (6,5)
I believe the answer is:
silver medal
'second prize' is the definition.
(eg at the Olympics)
'mr dave ellis in the medley' is the wordplay.
'mr dave ellis' anagrams to 'SILVER MEDAL'.
Though, I'm unsure how the anagram is indicated.
'for' is the link.
Can you help me to learn more?
(Other definitions for silver medal that I've seen before include "What won't satisfy champion" , "Olympic prize" , "Prize for second place" , "Runner-up award" , "Sporting prize" .)