Learner to probe snooker equipment and complete game (6)
I believe the answer is:
cluedo
'game' is the definition.
(I've seen this before)
'learner to probe snooker equipment and complete' is the wordplay.
'learner' becomes 'l' (as in a learner driver with L-plates on their car).
'to probe' means one lot of letters goes inside another (probe can mean to poke into).
'snooker equipment' becomes 'cue' (stick used when playing snooker).
'and' says to put letters next to each other.
'complete' becomes 'do' (doing is a kind of completing).
'l' inserted inside 'cue' is 'clue'.
'clue'+'do'='CLUEDO'
(Other definitions for cluedo that I've seen before include "Detective game" , "Murder mystery board game" .)