Hearing aid provided essential quality? (5)
I believe the answer is:
gavel
'hearing aid' is the definition.
(I've seen this in another clue)
'provided essential quality?' is the wordplay.
'provided' becomes 'gave' (giving is a kind of providing).
'essential quality?' becomes 'l' (I am not sure about this - if you are sure you should believe this answer much more).
'gave'+'l'='GAVEL'
Can you help me to learn more?
(Other definitions for gavel that I've seen before include "Chairman's hammer" , "equipment for auctioneer" , "An auctioneer's wooden hammer" , "Ceremonial mallet" , "Small hammer" .)