One clinging to another's audible echo in part (5)
I believe the answer is:
leech
'one clinging' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'another's audible echo in part' is the wordplay.
'in part' indicates a hidden word.
'LEECH' is hidden in the letters of 'anothers audible echo'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for leech that I've seen before include "Parasite - hanger-on" , "Medicinal bloodsucker" , "Blood sucker" , "Old doctor" , "Old physician" .)