DNA profiling with saliva leaves suspect conclusively shocked (6)
I believe the answer is:
aghast
'shocked' is the definition.
(I know that shocked can be written as aghast)
'dna profiling with saliva leaves suspect conclusively' is the wordplay.
'conclusively' suggests the final letters (the letter that concludes the word).
The last letters of 'dna profiling with saliva leaves suspect' are 'AGHAST'.
(Other definitions for aghast that I've seen before include "Deeply shocked" , "Confounded" , "Filled with fear and consternation" , "Appalled, shocked" , "'Horrified, shocked (6)'" .)