From old-timer I'd get a wrinkle (5)
I believe the answer is:
ridge
'a wrinkle' is the definition.
(I've seen this before)
'from old-timer i'd get' is the wordplay.
'from' indicates the answer is hidden within the clue.
'RIDGE' is hidden in the letters of 'old timer id get'.
(Other definitions for ridge that I've seen before include "Top of sloping roof" , "Narrow raised band on a surface" , "Long raised strip as of hills" , "German Baltic port, Buxtehude home" , "roof-tree" .)