Shut inside, finally welcome shade (3)
I believe the answer is:
hue
'shade' is the definition.
(I've seen this before)
'shut inside finally welcome' is the wordplay.
'inside' means to look at the middle letters.
'finally' indicates one should take the final letters.
The middle of 'shut' is 'hu'.
The last letter of 'welcome' is 'e'.
'hu'+'e'='HUE'
(Other definitions for hue that I've seen before include "complexion" , "General hubbub - . . . and cry" , "red or black, say" , "Colour or tint" , "Cast" .)