Crossword Clue:

Gain control of overcome

AnswerCrossword Clue
CORNERTHEMARKETGain control of a commodity
CORNERTHEMARKETGain exclusive control
POSSESSGain control over.
SEWUPGain complete control over
POWERGRABAttempt to gain control, say
SIEGEPersistent attempt to gain control.