Travel agency giving shelter to a crested African bird (7)
I believe the answer is:
touraco
'crested african bird' is the definition.
'travel agency giving shelter to a' is the wordplay.
'travel' becomes 'tour' (tour is a kind of travel).
'agency giving' becomes 'co' (I can't justify this - if you can you should believe this answer much more).
'shelter' indicates putting letters inside.
'tour'+'co'='tourco'
'tourco' enclosing 'a' is 'TOURACO'.
(Other definitions for touraco that I've seen before include "brightly-coloured bird" , "Brightly coloured, crested bird of cuckoo family" , "18's [BIRD]" , "African bird; our coat (anagram)" , "African wildlife" .)