Imitate introductions from eccentric comedian hosting Oscars (4)
I believe the answer is:
echo
'imitate' is the definition.
(I've seen this before)
'introductions from eccentric comedian hosting oscars' is the wordplay.
'introductions from' says to take the initial letters.
The initial letters of 'eccentric comedian hosting oscars' is 'ECHO'.
(Other definitions for echo that I've seen before include "Parrot" , "Sound returning some moments later" , "Audio effect" , "Greek nymph, spurned by Narcissus, who pined away until only her voice remained" , "one catches on the rebound?" .)