Intensify; make greater (8)
I believe the answer is:
redouble
(Other definitions for redouble that I've seen before include "Bid" , "increase fourfold" , "Be louder to multiply by four - say degree of effort" , "Produce more" , "Bridge call" .)
I believe the answer is:
redouble
(Other definitions for redouble that I've seen before include "Bid" , "increase fourfold" , "Be louder to multiply by four - say degree of effort" , "Produce more" , "Bridge call" .)