Opener: cricketer who's gloved bouncer, say?
I believe the answer is:
doorkeeper
'gloved bouncer say?' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'opener cricketer' is the wordplay.
'opener' becomes 'door' (I've seen this before).
'cricketer' becomes 'keeper' (I can't justify this - if you can you should give a lot more credence to this answer).
'door'+'keeper'='DOORKEEPER'
'who's' is the link.
Can you help me to learn more?
(Other definitions for doorkeeper that I've seen before include "Person on duty at entrance" , "Porter" , "Admission controller" , "He attends an opening" , "One on duty at building's entrance" .)