Place of depravity old bikers get upset over entering (5)
I believe the answer is:
sodom
'place of depravity' is the definition.
(I've seen this before)
'old bikers get upset over entering' is the wordplay.
'old bikers' becomes 'mods'.
'get upset' says the letters should be written backwards (I've seen 'getting upset' mean this).
'over' becomes 'o' (cricket abbreviation).
'entering' means one lot of letters goes inside another.
'mods' backwards is 'sdom'.
'sdom' going around 'o' is 'SODOM'.
(Other definitions for sodom that I've seen before include "Twin town to Gomorrah" , "Ancient city destroyed by God for wickedness" , "Sinful city of the Bible" , "The piece of turf starts the wicked city" , "One of the biblical city destroyed for its wickedness" .)