Do they sound a bit clumsy to a doctor? (5)
I believe the answer is:
drums
'do they sound a bit' is the definition.
The definition suggests an adverb but the answer is not.
'clumsy to a doctor?' is the wordplay.
'clumsy' becomes 'ums' (I am not sure about this - if you are sure you should believe this answer much more).
'to' is a charade indicator (letters next to each other) (I've seen this in other clues).
'a doctor?' becomes 'Dr' (abbreviation).
'ums' after 'dr' is 'DRUMS'.
Can you help me to learn more?
(Other definitions for drums that I've seen before include "Containers" , "Percussion instruments" .)