They give way indoors! (6)
I believe the answer is:
donors
'they give' is the definition.
(I've seen this in another clue)
'way indoors' is the wordplay.
I cannot really see how this works, but
'way' could be 's' (Compass direction - South) and 's' is present in the answer.
The remaining letters 'donor' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for donors that I've seen before include "Givers as of blood" , "presenters" , "They give to others, maybe blood" , "They give, money or blood" , "They give, blood say" .)