Don turned up with heavy weight (3,2)
I believe the answer is:
put on
'don' is the definition.
(synonyms)
'turned up with heavy weight' is the wordplay.
'turned' says the letters should be written in reverse.
'with' means one lot of letters go next to another.
'heavy weight' becomes 'ton' (a ton weighs a lot).
'up' in reverse letter order is 'pu'.
'pu'+'ton'='PUT-ON'
(Other definitions for put on that I've seen before include "Apply (to a surface) - present (on stage)" , "Don clothes or stage play" , "Assume < present" , "in an unnatural way" , "Increase as with weight" .)