CEO engages two learners and string player (5)
I believe the answer is:
cello
'string player' is the definition.
'cello' can be an answer for 'string' (thesaurus). I'm not sure about the 'player' bit.
'ceo engages two learners' is the wordplay.
'two learners' means two substitutions for 'learner'.
'engages' means one lot of letters goes inside another.
'learner' becomes 'l' (as in a learner driver with L-plates on their car).
'learner' becomes 'l' (as in a learner driver with L-plates on their car).
'l'+'l'='ll'
'ceo' going around 'll' is 'CELLO'.
'and' is the link.
Can you help me to learn more?
(Other definitions for cello that I've seen before include "10 [INSTRUMENT]" , "music produced by this?" , "Viola's bigger brother?" , "Tortelier's instrument" , "Bass stringed instrument" .)