Area where the race is sabotaged (7)
I believe the answer is:
hectare
'area' is the definition.
(I've seen this before)
'the race is sabotaged' is the wordplay.
'is sabotaged' indicates an anagram.
'the'+'race'='therace'
'therace' is an anagram of 'HECTARE'.
'where' acts as a link.
(Other definitions for hectare that I've seen before include "The race (anag) - unit of area" , "Metric measure of area" , "10,000 square metres" , "Amount of ground" , "Metric land area" .)