Encouragement or help (5)
I believe the answer is:
boost
This clue is a double definition.
'encouragement' is the first definition.
(I know that encouragement can be written as boost)
'help' is the second definition.
(I know that boost is a type of help)
(Other definitions for boost that I've seen before include "Push up (eg morale, chances)" , "Encourage; push up" , "Fillip" , "promotion" , "Increase, amplify" .)