Window fitted in colossal attic extension (7)
I believe the answer is:
lattice
'window' is the definition.
(type of window)
'in colossal attic extension' is the wordplay.
'in' indicates the answer is hidden within the clue.
'LATTICE' is hidden in the letters of 'colossal attic extension'.
'fitted' is the link.
I am not very happy about this link. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for lattice that I've seen before include "Support for plants" , "type of tracery" , "Framework for window" , "Network of crossed bars" , "Screen of crossed bars" .)