Foolishly fail to get out of the way at last! (5)
I believe the answer is:
final
'last' is the definition.
(I know that last can be written as final)
'foolishly fail to get out of the way' is the wordplay.
'foolishly' is an anagram indicator.
'to get' is an insertion indicator.
'out of the way' becomes 'n' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'fail' anagrammed gives 'fial'.
'fial' going around 'n' is 'FINAL'.
'at' acts as a link.
Can you help me to learn more?
(Other definitions for final that I've seen before include "Coming at the end" , "Last, ultimate" , "Not to be altered" , "The last exam or leg of competition" , "Last in a series of games or contests" .)