Massage report's sure captivating son -- it reduces wrinkles (7,5)
I believe the answer is:
trouser press
'it reduces wrinkles' is the definition.
(device reducing creases or wrinkles in clothing)
'massage report's sure captivating son' is the wordplay.
'massage' indicates anagramming the letters.
'captivating' indicates putting letters inside (I've seen this in other clues).
'son' becomes 's' (genealogical abbreviation for son).
'reports'+'sure'='reportssure'
'reportssure' anagrammed gives 'trouserpres'.
'trouserpres' placed around 's' is 'TROUSER PRESS'.
(Other definitions for trouser press that I've seen before include "Flattener for the bottom half of a suit" , "It decreases gents' clothing" , "Means of keeping crease in garment" .)