Footwear I sell and spread out (11)
I believe the answer is:
espadrilles
'footwear' is the definition.
(I've seen this before)
'i sell and spread out' is the wordplay.
'and' is a charade indicator (letters next to each other).
'out' indicates an anagram (out can mean wrong or inaccurate).
'i'+'sell'='isell'
'isell' after 'spread' is 'spreadisell'.
'spreadisell' is an anagram of 'ESPADRILLES'.
(Other definitions for espadrilles that I've seen before include "canvas footwear" , "Rope-soled shoes" .)