Remind people of lecherous fellow getting ahead (4,2)
I believe the answer is:
'remind people of' is the definition.
(as in raking up an old story)
'lecherous fellow getting ahead' is the wordplay.
'lecherous fellow' becomes 'rake' (old-fashioned term for an immoral man).
'getting' means one lot of letters go next to another.
'ahead' becomes 'up' (similar in meaning).
(Other definitions for rake up that I've seen before include "Revive memory of unpleasant incident - using garden tool?" , "Revive unpleasant memory, using garden fork?" , "Revive memory of something unpleasant - using garden tool?" , "Bring to light, the past say" .)