Enthusiastic judge, extremely timely (6)
I believe the answer is:
hearty
'enthusiastic' is the definition.
(I've seen this before)
'judge extremely timely' is the wordplay.
'judge' becomes 'hear' (as in to hear a court case).
'extremely' means to remove the middle letters (only the extremes of the word are used).
'timely' with its centre taken out is 'ty'.
'hear'+'ty'='HEARTY'
(Other definitions for hearty that I've seen before include "Warm, vigorous" , "Enthusastic" , "shipmate?" , "Jovial fellow" , "Without reservation, satisfying" .)