Nevertheless, it can be quiet at night (5)
I believe the answer is:
still
'nevertheless' is the definition.
(I know that nevertheless can be written as still)
'it can be quiet at night' is the wordplay.
I cannot quite understand how this works, but
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is present in the answer.
The remaining letters 'sill' 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 still that I've seen before include "gentle" , "Static photograph" , "Yet - hushed" , "Source of alcohol" , "Even now; not moving" .)