To be crying out for something means to need something very much. Just as a baby or a young child cries out in order to get what it needs to cry out for something means that something is needed which is apparent or obvious.

1. My sitting room looks so outdated and rundown. It's crying out for some new furniture.
2. When Jack fell down the stairs and broke his leg, he had to cry out for help as he couldn't move by himself.

1. The business has so much potential. It's just crying out for an ambitious, capable person to come along and turn it into something highly profitable.
2. Your start-up is crying out for a sophisticated webstore. If you had one, your sales would increase massively.