They’re spun either way (5)
I believe the answer is:
yarns
'they're' is the definition.
The definition suggests an adverb but the answer is not.
'spun either way' is the wordplay.
'spun' becomes 'yarn' (I've seen this before).
'either way' becomes 's' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'yarn'+'s'='YARNS'
Can you help me to learn more?
(Other definitions for yarns that I've seen before include "Threads spun from wool, cotton, etc." , "Tales; threads" , "Wools or stories" , "rambling stories" , "Anecdotes" .)