Can I give a specific user edit permissions on a field?

Hi everyone, hoping for some help here.

I own a new home construction company and have a table in my app called "Home Plans." In that table are listed all details pertaining to specific home plans that we use over and over.

I have multiple users who do Estimating for me, but one MAIN user who aggregates data after a home is built and updates home plans based on the data from the field.  That user is also an Estimator, but is basically the Estimating Manager.

The Estimating Manager has all the same permissions, home page, etc as the Estimators, with the exception that he can edit home plans.

I would like to avoid cloning the Estimator role if possible, but need him to have the ability to edit home plans.

Is it possible to grant this individual use "Edit" access to certain fields in home plans? Or would I have to clone the Estimator role and create a new role with the Edit permissions?

Thanks for your help!