Thread one can possibly sell out of (5)
I believe the answer is:
lisle
'thread' is the definition.
(I know that lisle is a type of cotton)
'one can possibly sell out of' is the wordplay.
'one can' becomes 'li' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'possibly' is an anagram indicator.
'out of' means to remove the last letter (I've seen 'out' mean this).
'sell' with its last letter taken away is 'sel'.
'sel' anagrammed gives 'sle'.
'li'+'sle'='LISLE'
Can you help me to learn more?
(Other definitions for lisle that I've seen before include "Cotton stocking thread" , "Type of cotton yarn" , "Strong cotton fabric" , "Pedestrianised city" , "(Fabric woven with) a fine cotton thread" .)