Steals the sheets covering the sick (8)
I believe the answer is:
pillages
'steals' is the definition.
The definition and answer can be both related to property as well as being plural nouns.
Maybe you can see a link between them that I can't see?
'sheets covering the sick' is the wordplay.
'sheets' becomes 'pages' (page is a kind of sheet).
'covering' is an insertion indicator.
'the sick' becomes 'ill' (I've seen this before).
'pages' placed around 'ill' is 'PILLAGES'.
'the' acts as a link.
Can you help me to learn more?
(Another definition for pillages that I've seen is " Plunders, loots".)