Grow louder (5)
I believe the answer is:
swell
(Other definitions for swell that I've seen before include "Heave of sea; expand" , "organ effect" , "get fat" , "marvellous" , "'Increase in size, number etc (5)'" .)
I believe the answer is:
swell
(Other definitions for swell that I've seen before include "Heave of sea; expand" , "organ effect" , "get fat" , "marvellous" , "'Increase in size, number etc (5)'" .)