Caught unawares, Spurs dire, out of form (9)
I believe the answer is:
surprised
'caught unawares' is the definition.
'spurs dire out of form' is the wordplay.
'out of form' is an anagram indicator.
'spurs'+'dire'='spursdire'
'spursdire' with letters rearranged gives 'SURPRISED'.
(Other definitions for surprised that I've seen before include "Took unawares" , "Shocked" , "Astounded" , "left open-mouthed" , "Taken unawares" .)