Stylish dog with no tail outside wood (7)
I believe the answer is:
dashing
'stylish' is the definition.
(I've seen this before)
'dog with no tail outside wood' is the wordplay.
'dog' becomes 'dingo' (I've seen this before).
'with no tail' means to remove the last letter.
'outside' means one lot of letters goes inside another.
'wood' becomes 'ash' (wood from an ash tree).
'dingo' with its final letter taken off is 'ding'.
'ding' enclosing 'ash' is 'DASHING'.
(Other definitions for dashing that I've seen before include "(Of male) stylish, spirited" , "Frustrating; debonair" , "sprinting" , "Swashbuckling" , "Rakish" .)