Sentence:  She was looking more like Sherlock Holmes than ever. Slap a dressing-gown on her and give her a <WSD>violin</WSD>, and she could have walked straight into Baker Street and no questions asked. 
Meaning of the word marked with <WSD> tags:  A musical four-string instrument, generally played with a bow or by plucking the string, with the pitch set by pressing the strings at the appropriate place with the fingers; also any instrument of the [https://en.wikipedia.org/wiki/Violin_family violin family].