Desert - perhaps at speed it sounds like dessert after volume's adjusted initially (7)
I believe the answer is:
vamoose
'desert perhaps at speed it sounds' is the definition.
I can't judge whether this definition defines the answer.
'dessert after volume's adjusted initially' is the wordplay.
'dessert' becomes 'moose' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'after' is a charade indicator (letters next to each other).
'initially' says to take the initial letters.
The initial letters of 'volumes adjusted' is 'va'.
'moose' after 'va' is 'VAMOOSE'.
'like' acts as a link.
Can you help me to learn more?
(Other definitions for vamoose that I've seen before include "Sling your hook!" , "Depart hurriedly" , "Bunk" , "Hop it, amigo!" , "vanish" .)