Classic line in game of cricket effective, at first (5)
I believe the answer is:
oldie
'classic' is the definition.
(eg a classic song)
'line in game of cricket effective at first' is the wordplay.
'line' becomes 'l' (used when specifying particular lines from a poem).
'in' is an insertion indicator.
'game of cricket' becomes 'odi' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'at first' indicates taking the first letters.
The initial letter of 'effective' is 'e'.
'l' placed within 'odi' is 'oldi'.
'oldi'+'e'='OLDIE'
Can you help me to learn more?
(Other definitions for oldie that I've seen before include "An octogenarian, perhaps" , "Standard song" , "Perennially popular song or film, often golden" , "Popular song from the past" , "classic film perhaps" .)