Rank rubbish safe to be put outside (7)
I believe the answer is:
stature
'rank' is the definition.
(thesaurus)
'rubbish safe to be put outside' is the wordplay.
'rubbish' becomes 'tat' (low-quality items or material).
'safe' becomes 'sure' (I've seen this before).
'to be put outside' is an insertion indicator.
'tat' inserted into 'sure' is 'STATURE'.
(Other definitions for stature that I've seen before include "Importance, reputation" , "Height, calibre" , "Consequence" , "Natural standing height" , "Size or standing" .)