Put in order re tins (6)
I believe the answer is:
insert
'put in' is the definition.
(synonyms)
'order re tins' is the wordplay.
'order' indicates anagramming the letters.
're'+'tins'='retins'
'retins' anagrammed gives 'INSERT'.
(Other definitions for insert that I've seen before include "Put thing in between others" , "One might be seen" , "Place (something) inside (something else)" , "place in the interior" , "Put between or within other things" .)