After indications of displeasure time to improve (5)
I believe the answer is:
boost
'improve' is the definition.
(thesaurus)
'after indications of displeasure time' is the wordplay.
'after' says to put letters next to each other.
'indications of displeasure' becomes 'boos' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'time' becomes 't' (abbreviation).
'boos' next to 't' is 'BOOST'.
'to' is the link.
Can you help me to learn more?
(Other definitions for boost that I've seen before include "Give hope or support to" , "Promote" , "Push up (eg morale, chances)" , "Increase or encourage(ment)" , "Increase, amplify" .)