Augment (8)
'augment' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for increase that I've seen before include "Become bigger or greater in amount" , "extra money at work" , "Add, make bigger" , "Make larger in a sincere way" , "Become greater in number" .)
'augment' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for enhance that I've seen before include "Increase attractiveness of, improve" , "Improve the quality of (something)" , "lift" , "Improve quality (of item)" , "improve things" .)