Crossword Clue:

to increase or augment

AnswerCrossword Clue
EXTENDERAdditive to increase volume or bulk
LEDGERLINESThese are added above or below a staff to increase its range: 2 wds.
HEIGHTENAugment or intensify
MATHERCotton or Increase
HEIGHTENIncrease or enhance
HIKERaise or increase sharply
MATHERClergyman Cotton or Increase
SPIRALContinuous, widening increase or decrease.