Leading corrupted, that's true (7)
I believe the answer is:
aligned
'true' is the definition.
Both the definition and answer are adjectives. Maybe there's an association between them I don't understand?
'leading corrupted' is the wordplay.
'corrupted' indicates anagramming the letters.
'leading' anagrammed gives 'ALIGNED'.
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for aligned that I've seen before include "Linearly positioned" , "Put straight" , "made to toe the line" , "Placed in the right relative position" , "Dealing (anag) - straight?" .)