Elvis Presley dismissed severely by mouthpieces (4)
I believe the answer is:
lips
'mouthpieces' is the definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Perhaps there's an association between them I don't understand?
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for lips that I've seen before include "margins" , "Brims, rims" , "Top edges of vessels" , "What form the opening to the mouth" , "Folds of tissue round the mouth" .)