Glaswegian, for example, in small bed (4)
I believe the answer is:
scot
'glaswegian for example' is the definition.
(glaswegian is a kind of Scot)
'small bed' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'bed' becomes 'cot' (cot is a type of bed).
's'+'cot'='SCOT'
'in' acts as a link.
(Other definitions for scot that I've seen before include "Stevenson was one" , "Payment" , "Native of northern Great Britain" , "Highlander, say" , "British northerner" .)