Invalids limit wearing underwear (8)
I believe the answer is:
patients
'invalids' is the definition.
The definition and answer can be both people as well as being plural nouns.
Perhaps they are linked in a way I don't understand?
'limit wearing underwear' is the wordplay.
'limit' becomes 'tie' (tying is a kind of limiting).
'wearing' means one lot of letters goes inside another.
'underwear' becomes 'pants' (underpants).
'tie' going into 'pants' is 'PATIENTS'.
Can you help me to learn more?
(Other definitions for patients that I've seen before include "I sent Pat into the hospital inmates" , "People under the doctor" , "People being treated by doctors, may be in hospital" , "Those in a ward, perhaps" , "People suffering" .)