Answer:

CLOSEIN

AnswerCrossword Clue
CLOSEINPrepare for capture
CLOSEINNarrow the gap
CLOSEINPrepare to raid
CLOSEINApproach
CLOSEINConverge (on)
CLOSEINTighten the net (on)
CLOSEINSurround.
CLOSEINEncircle and isolate
CLOSEINSurround, with "on"
CLOSEINEncircle
CLOSEINPen up
CLOSEINDraw near
CLOSEINTighten the circle