Cricketer who’ll start with a half of beer (6)
I believe the answer is:
opener
'cricketer' is the definition.
(I've seen this before)
'who'll start with a half of beer' is the wordplay.
'who'll start' becomes 'op' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'with' says to put letters next to each other.
'a half of' suggests halving the letters.
'beer' becomes 'pilsener' (pilsener is a kind of beer).
'pilsener' with half the letters taken is 'ener'.
'op'+'ener'='OPENER'
Can you help me to learn more?
(Other definitions for opener that I've seen before include "Key -- one of two batsman in a side" , "man, first at the crease?" , "Kitchen item" , "Corkscrew, for example" , "It may provide access to food" .)