Construction is permitted if I certify missing sections (7)
I believe the answer is:
edifice
'construction' is the definition.
(edifice is a kind of construction)
'permitted if i certify missing sections' is the wordplay.
'sections' says the answer is hidden in the clue (I've seen 'section' mean this).
'EDIFICE' is hidden in the letters of 'permitted if i certify missing'.
'is' acts as a link.
(Other definitions for edifice that I've seen before include "Permanent building" , "Large structure" , "'Large, imposing building (7)'" , "Construction" , "Grand building" .)