Unfinished in short competition, allowed time finally (10)
I believe the answer is:
incomplete
'unfinished' is the definition.
(I know that unfinished can be written as incomplete)
'in short competition allowed time finally' is the wordplay.
'short' means to remove the last letter.
'competition' becomes 'comp' (I've seen this in other clues).
'allowed' becomes 'let' (to let is to allow or permit).
'time finally' becomes 'te' (I can't justify this - if you can you should give a lot more credence to this answer).
'comp'+'let'='complet'
'complet' with its last letter taken off is 'comple'.
'in'+'comple'+'te'='INCOMPLETE'
Can you help me to learn more?
(Other definitions for incomplete that I've seen before include "Inadequate" , "Not yet finished" , "not done" , "not sufficient" , "Lacking" .)