Mike entertained by Canadian singer's drone (6)
I believe the answer is:
bumble
'drone' is the definition.
(I've seen this before)
'mike entertained by canadian singer's' is the wordplay.
'mike' becomes 'M' (phonetic alphabet: alpha, bravo, charlie etc.).
'entertained by' indicates putting letters inside (inserted letters are hosted or entertained).
'canadian singer' becomes 'Buble' (Canadian singer Michael Buble).
'm' put into 'buble' is 'BUMBLE'.
(Other definitions for bumble that I've seen before include "Act or speak awkwardly" , "[MESS UP]" , "blunder?" , "who served gruelling regime in workhouse?" , "Drone" .)