Initially burglars always like doors without locks (4)
I believe the answer is:
bald
'without locks' is the definition.
(without locks of hair)
'initially burglars always like doors' is the wordplay.
'initially' says to take the initial letters.
The first letters of 'burglars always like doors' is 'BALD'.
(Other definitions for bald that I've seen before include "Lacking hair on the head" , "Not covered with hair" , "Without hair" , "Lacking hair on the scalp" , "Follicly challenged?" .)