True about having space for occupation (6)
I believe the answer is:
tenure
'for occupation' is the definition.
(I've seen this before)
'true about having space' is the wordplay.
'about' indicates an anagram.
'having' indicates putting letters inside.
'space' becomes 'en' (in printing, a space as wide as a letter 'n').
'true' is an anagram of 'ture'.
'ture' enclosing 'en' is 'TENURE'.
(Other definitions for tenure that I've seen before include "Length of time a position is held" , "Way of holding" , "Possession of office or property" , "Retune (anag.)" , "Term of office" .)