Paper used to cover model turning up to go to court (6)
I believe the answer is:
tissue
'paper' is the definition.
(tissue is a kind of paper)
'up to go to court' is the wordplay.
'up' shows that the letters should be reversed in order (in down clue: letters go upwards).
'to go' becomes 'sit' (sitting is a kind of going).
'to court' becomes 'sue' (I've seen this in other clues).
'sit' written backwards gives 'tis'.
'tis'+'sue'='TISSUE'
'used to cover model turning' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for tissue that I've seen before include "load of lies?" , "Web; fabric" , "Soft thin paper in layers" , "Flimsy paper" , "full of lies?" .)