Boost (7)
'boost' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for enhance that I've seen before include "Add function, appeal, to" , "Increase attractiveness of, improve" , "Make even better" , "Intensify, increase or improve" , "Boost" .)
(Other definitions for bolster that I've seen before include "Large pillow" , "Extended pillow" , "Support; long pillow" , "Strengthen - long pillow" , "Long thick pillow" .)
'boost' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for supplement that I've seen before include "something to remedy a deficiency" , "additive" , "addition" , "Add to (something)" , "Boost" .)
'boost' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for fillip that I've seen before include "Incitement" , "Something adding stimulation" , "give encouragement" , "Encouraging boost" , "'Short, quick stimulus (6)'" .)