Nevertheless I will shortly get under way (5)
I believe the answer is:
still
'nevertheless' is the definition.
(I know that nevertheless can be written as still)
'i will shortly get under way' is the wordplay.
I cannot quite see how this works, but
'i' is found in the answer.
'will' could be 'll' (contracted form, as in 'he'll' - 'he will') and 'll' is located in the answer.
'way' could be 'st' (abbreviation for street) and 'st' is found within the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for still that I've seen before include "Unmoving yet" , "Tranquil" , "Retort; nevertheless" , "Yet - hushed" , "activity of one manufacturing spirits?" .)