In want of something
Definition 1 of 2
Pro Tip 1/3Nuance of Need
Emphasizes lacking essentials, not just any desire. 
This community is in want of a health clinic.
Pro Tip 2/3Severity of Lack
Used when the absence is critical or very noticeable. 
Their team was in want of a skilled leader.
Pro Tip 3/3Implying Urgency
Suggests a need to address the want soon. 
The shelter is in want of blankets as winter approaches.