have to go some

have to go some to (do something)

To have to put forth great effort in order to do something. You'll have to go some to beat her time—she really swam a great race.
See also: go, have

have to go some (to do something)

to need to try very hard to accomplish something. That's really great, Jean! I have to go some to do better than that!
See also: go, have