Building Sheeran, if frozen (7)
I believe the answer is:
edifice
'building' is the definition.
(I know that building can be written as edifice)
'sheeran if frozen' is the wordplay.
'sheeran' becomes 'ed' (Ed Sheeran).
'frozen' becomes 'ice' (I've seen this in other clues).
'ed'+'if'+'ice'='EDIFICE'
(Other definitions for edifice that I've seen before include "Monument" , "Construction" , "Impressive building" , "impressive pile!" , "'Large, imposing building (7)'" .)