Decent hunting around end of August (6)
I believe the answer is:
chaste
'decent' is the definition.
(thesaurus)
'hunting around end of august' is the wordplay.
'hunting' becomes 'chase'.
'around' is an insertion indicator.
'end of' indicates one should take the final letters.
The last letter of 'august' is 't'.
'chase' enclosing 't' is 'CHASTE'.
(Other definitions for chaste that I've seen before include "avoiding relations" , "Sexually virtuous" , "He-cats could be virtuous, strangely" , "Pure and virginal" , "Untarnished" .)