Whatever I type contains such truth (6)
I believe the answer is:
verity
'truth' is the definition.
(verity is a kind of truth)
'whatever i type contains' is the wordplay.
'contains' indicates the answer is hidden within the clue.
'VERITY' is hidden within 'whatever i type'.
'such' is the link.
(Other definitions for verity that I've seen before include "Truth - girl's name" , "Truthfulness" , "A lady" .)