Revel in breaking the law on the cheap (6)
I believe the answer is:
wallow
'revel' is the definition.
(I know that wallow is a more specific form of revel)
'breaking the law on the cheap' is the wordplay.
'breaking' indicates an anagram.
'on' says to put letters next to each other.
'the cheap' becomes 'low'.
'law' anagrammed gives 'wal'.
'wal'+'low'='WALLOW'
'in' is the link.
(Other definitions for wallow that I've seen before include "Indulge excessively, in self-pity perhaps" , "Roll around as in mud" , "Luxuriate (in mud, muck)" , "Lie about in mud or water" , "Roll about as in water or mud" .)