Record time making garment (7)
I believe the answer is:
singlet
'garment' is the definition.
(singlet is a kind of garment)
'record time' is the wordplay.
'record' becomes 'single' (I've seen this before).
'time' becomes 't' (abbreviation).
'single'+'t'='SINGLET'
'making' is the link.
(Other definitions for singlet that I've seen before include "underclothing" , "Something to wear" , "Tingles in vest" , "Sleeveless shirt" , "One unaccompanied" .)