Robber also cutting dash (6)
I believe the answer is:
bandit
'robber' is the definition.
(I've seen this before)
'also cutting dash' is the wordplay.
'also' becomes 'and' (I've seen this before).
'cutting' indicates putting letters inside (some letters cut their way into a word).
'dash' becomes 'bit' (both can mean a small amount).
'and' going into 'bit' is 'BANDIT'.
(Other definitions for bandit that I've seen before include "Armed brigand" , "Outlaw, brigand" , "hood" , "(One-armed?) outlaw" , "Armed outlaw" .)