Large building, partly buried if ice-station? (7)
I believe the answer is:
edifice
'large building' is the definition.
(I've seen this before)
'partly buried if ice-station?' is the wordplay.
'partly' indicates the answer is hidden within the clue (part of the clue is used).
'EDIFICE' is hidden within 'buried if ice station'.
(Other definitions for edifice that I've seen before include "Large structure" , "Grand building" , "impressive pile!" , "Impressive building" , "'Large, imposing building (7)'" .)