Big, lidless toilet in shelter (5)
I believe the answer is:
igloo
'shelter' is the definition.
(I know that igloo is a type of hovel)
'big lidless toilet' is the wordplay.
'lidless' means to remove the first letter.
'toilet' becomes 'loo' (loo can informally mean a toilet).
'big' with its initial letter taken away is 'ig'.
'ig'+'loo'='IGLOO'
'in' acts as a link.
(Other definitions for igloo that I've seen before include "Dome-shaped Eskimo house" , "From domed hut" , "An eskimo's ice-house" , "Inuit residence" , "Arctic dwelling" .)