Sort of TV large granny keeps? (6)
I believe the answer is:
plasma
'sort' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for plasma that I've seen before include "Colourless fluid of the blood and lymph" , "Colourless watery fluid of the blood" , "A psalm (anag.)" , "Part of blood; ionised material" , "Colourless fluid part of blood" .)