Scientists smell either way (7)
I believe the answer is:
boffins
'scientists' is the definition.
(boffin is a kind of scientist)
'smell either way' is the wordplay.
I cannot quite understand how this works, but
'smell' could be 'bo' (abbreviation for Body Odour) and 'bo' is present in the answer.
'way' could be 's' (Compass direction - South) and 's' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for boffins that I've seen is " Scientists".)