Child's protector in Abu Dhabi buildings (3)
I believe the answer is:
bib
'child's protector' is the definition.
(I've seen this before)
'in abu dhabi buildings' is the wordplay.
'in' indicates the answer is hidden within the clue.
'BIB' is hidden in the letters of 'abu dhabi buildings'.
(Other definitions for bib that I've seen before include "Baby's napkin" , "Baby's feeding cloth" , "Top part of an apron" , "Baby-feeding cloth" , "Protective cloth; fish" .)