Consumed in haste - a tendency to be discouraged (5)
I believe the answer is:
eaten
'consumed' is the definition.
(similar in meaning)
'haste a tendency to be discouraged' is the wordplay.
'EATEN' is hidden within the letters.
However, I am not sure how the hidden word is indicated.
'in' is the link.
Can you help me to learn more?
(Other definitions for eaten that I've seen before include "absorbed in the system" , "having taken courses?" , "Consumed" , "Upset" , "having been fed?" .)