Tremble when given a flavoured milk drink (5)
I believe the answer is:
shake
This clue could be a double definition.
'tremble when' is the first definition.
'shake' can be an answer for 'tremble' (synonyms). I am not sure about the 'when' bit.
'a flavoured milk drink' is the second definition.
(I've seen this before)
'given' is the link.
Can you help me to learn more?
(Other definitions for shake that I've seen before include "Upset" , "Rattle" , "Jolt or agitate" , "Flavoured milk drink" , "Tremble; milk drink" .)