Twofold praise on return (4)
I believe the answer is:
dual
'twofold' is the definition.
(synonyms)
'praise on return' is the wordplay.
'praise' becomes 'laud' (lauding is a kind of praising).
'on return' says the letters should be written backwards.
'laud' reversed gives 'DUAL'.
(Other definitions for dual that I've seen before include "Road with central division" , "Consisting of two parts" , "Twofold" , "Double" , "Having two distinct functions" .)