Twitch when trapped by blue adhesive (6)
I believe the answer is:
sticky
'adhesive' is the definition.
(similar in meaning)
'twitch when trapped by blue' is the wordplay.
'twitch when' becomes 'tic' (tic is a kind of twitch. I am not sure about the 'when' bit.).
'trapped by' indicates putting letters inside.
'blue' becomes 'sky' (sky blue is a shade of blue).
'tic' inserted into 'sky' is 'STICKY'.
Can you help me to learn more?
(Other definitions for sticky that I've seen before include "Twiggy" , "Adhesive, gluey" , "Viscous - problematic" , "Difficult - adhesive" , "Gluey, gooey" .)