Remind people of lecherous fellow getting ahead (4,2)
I believe the answer is:
rake up
'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).
'rake'+'up'='RAKE UP'
(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" .)