a little more; a little longer; slightly more or a bit longer
今少し待ってください、すぐ終わります。
Please wait a little longer; I'll be finished soon.
今少し時間があれば手伝えます。
If I had a little more time now, I could help.
もう今少し頑張れば合格できるはずだ。
If you try a little harder now, you should be able to pass.