The animal, stake to a pole, foolishly (8)
I believe the answer is:
antelope
'the animal' is the definition.
(I've seen this before)
'stake to a pole foolishly' is the wordplay.
'stake' becomes 'ante' (ante is a kind of stake).
'foolishly' indicates anagramming the letters.
'pole' with letters rearranged gives 'lope'.
'ante'+'lope'='ANTELOPE'
(Other definitions for antelope that I've seen before include "horny beast!" , "Reebok perhaps" , "it runs very quickly" , "A swift-running animal like gazelle" , "Deer-like ruminant" .)