Grizabella maybe right to leave Barrow (3)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

CART (barrow) loses R for right. Apparently Grizabella is a character in Lloyd Webber’s musical Cats, which I have never seen and never will; I dislike the whole musicals genre. I knew she isn’t a character in T S Eliot’s original Old Possum’s Book of Practical Cats, which I do know and like. Wikipedia tells me that the musical has added characters, some of which were in unpublished drafts by TSE, including Grizabella, so I’ve learnt something new.