Double praise in return (4)
I believe the answer is:
dual
'double' is the definition.
(I know that double can be written as dual)
'praise in return' is the wordplay.
'praise' becomes 'laud' (lauding is a kind of praising).
'in return' says the letters should be written in reverse (return can mean to go backwards).
'laud' backwards is 'DUAL'.
(Other definitions for dual that I've seen before include "Having two distinct functions" , "Road with central division" , "Twofold" , "Double" , "Consisting of two parts" .)