Turned on cash register containing note with forged date (10)
I believe the answer is:
titillated
'turned on' is the definition.
(thesaurus)
'cash register containing note with forged date' is the wordplay.
'cash register' becomes 'till' (I've seen this before).
'containing' is an insertion indicator.
'note' becomes 'ti' (I've seen this in other clues).
'with' means one lot of letters go next to another.
'forged' is an anagram indicator.
'till' going around 'ti' is 'titill'.
'date' is an anagram of 'ated'.
'titill'+'ated'='TITILLATED'
(Another definition for titillated that I've seen is " Turned-on".)