What the diner ordered in a low voice? (4)
I believe the answer is:
bass
'low voice?' is the definition.
(I've seen this in another clue)
'what the diner ordered in a' is the wordplay.
I cannot really understand how this works, but
'a' is within the answer.
The remaining letters 'bss' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for bass that I've seen before include "Type of fish" , "Deep-toned" , "Low singing voice" , "deep in the sound" , "Lowest adult male singing voice" .)