Shake with anxiety (5)
I believe the answer is:
worry
I believe this is a double definition.
'shake' is the first definition.
(thesaurus)
'anxiety' is the second definition.
(I've seen this before)
'with' acts as a link.
(Other definitions for worry that I've seen before include "Harry" , "Fret, be disturbed in mind" , "Concern, anxiety, uneasiness" , "'Anxiety, uneasiness (5)'" , "(Feel) anxiety" .)