Check building if shut (6)
I believe the answer is:
shufti
'check' is the definition.
I know nothing about this answer so I can't judge whether this works.
'building if shut' is the wordplay.
'building' indicates anagramming the letters.
'if'+'shut'='ifshut'
'ifshut' is an anagram of 'SHUFTI'.
Can you help me to learn more?
(Other definitions for shufti that I've seen before include "Colloquial word for look" , "Quick look or reconnoitre" , "Quick look round" , "Informally, a brief inspection or look" , "Peep (from the Arabic)" .)