Inexpensive woolly bear on sale (10)
I believe the answer is:
reasonable
'inexpensive' is the definition.
(I've seen this before)
'woolly bear on sale' is the wordplay.
'woolly' is an anagram indicator (I've seen this in other clues).
'bear'+'on'+'sale'='bearonsale'
'bearonsale' is an anagram of 'REASONABLE'.
(Other definitions for reasonable that I've seen before include "Fair, rational" , "description of rationality" , "Fair - inexpensive" , "Sound" , "Not excessive or extreme" .)