Disquiet from blood type being associated with fingerprints (6)
I believe the answer is:
abdabs
'disquiet' is the definition.
(abdabs can mean a feeling of disquiet)
'blood type being associated with fingerprints' is the wordplay.
'blood type' becomes 'AB' (AB is an example).
'being associated with' means one lot of letters go next to another.
'fingerprints' becomes 'dabs' (dab can mean a fingerprint).
'ab'+'dabs'='ABDABS'
'from' acts as a link.
(Other definitions for abdabs that I've seen before include "Extremely nervous state" , "extreme nervousness" , "Nervous irritation; the screaming --" , "feeling of anxiety" , "Nervous anxiety" .)