Snowman? College erected it (5)
I believe the answer is:
inuit
'snowman?' is the definition.
(person living in snowy region)
'college erected it' is the wordplay.
'college' becomes 'uni' (I've seen this in other clues).
'erected' says the letters should be written backwards.
'uni' written backwards gives 'inu'.
'inu'+'it'='INUIT'
(Other definitions for inuit that I've seen before include "Maybe Greenlander" , "native of the North" , "found in Greenland" , "Dwellers in the furthest north of America" , "Indigenous Greenlander" .)