Repeat after some reflection (4)
I believe the answer is:
echo
This clue is a double definition.
'repeat' is the first definition.
(I know that repeat can be written as echo)
'some reflection' is the second definition.
(echo is a kind of reflection)
'after' is the link.
(Other definitions for echo that I've seen before include "next to delta" , "Let's hear it again for the Greek nymph who loved Narcissus in vain" , "Repeat or reverberate" , "In Roman mythology, the nymph who loved Narcissus" , "Before foxtrot" .)