Crossword Genius

Hold out longer? (6)

Ross

I believe the answer is:

extend

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'hold out' is the definition.
(I know that hold out can be written as extend)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for extend that I've seen before include "Carry on" , "Draw out" , "Stretch out, say the hand of friendship" , "Enlarge, widen" , "Hold out or stretch out" .)

I've seen this clue in The Globe and Mail.
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