Try, try right away to be enthusiastic (6)
I believe the answer is:
hearty
'enthusiastic' is the definition.
(I've seen this before)
'try try right away' is the wordplay.
'try' becomes 'hear' (as in to try someone in court or hear their case).
'right' becomes 'r' (common abbreviation).
'away' suggests deleting specific letters.
'try' with 'r' taken out is 'ty'.
'hear'+'ty'='HEARTY'
'to be' is the link.
(Other definitions for hearty that I've seen before include "Loud and cheerful" , "Earthy (anag.)" , "thumping backs?" , "Warm, vigorous" , "Wholesome and substantial, meal say" .)