Sentence:  No want of hands in our Theatre, Miss Bertram. No want of <WSD>under strappers</WSD>—My sister desires her love, and hopes to be admitted into the Company, and will be happy to take the part of any old duenna or tame Confidante, that you may not like to do yourselves. 
Meaning of the word marked with <WSD> tags:  Any underling or inferior in office.