Black mollusc has strength we hear (6)
I believe the answer is:
mussel
'black mollusc' is the definition.
'mussel' can be an answer for 'mollusc' (mussel is a kind of mollusc). I'm not sure about the 'black' bit.
'strength we hear' is the wordplay.
'strength' becomes 'muscle' (muscle is a kind of strength).
'we hear' shows a homophone (sound like).
'muscle' sounds like 'MUSSEL'.
'has' acts as a link.
Can you help me to learn more?
(Other definitions for mussel that I've seen before include "Edible shellfish" , "Edible marine mollusc sold by Molly Malone - not the cockle" , "finds power in sound" , "Common edible marine mollusc" , "Black marine bivalve" .)