I'd say for it to be worth 4XP you need to trigger about at least 2 effects, more likely 3.
So how can you achieve this ?
- Evade every one with a 5 investigator (Finn even if he can't take it, Winifred, Kymani...) .
- Investigate with Trish's ability.
- Pay and throw a Cunning Distraction with Preston !
- Just play with other investigators that can evade and maybe synchronize your Clean Sneak copies.
Just be sure to have one extra action to move out of the location after you played this card unless a guardian is coming to kill them. (Blur is pretty usefull for that but Rogues don't lack more actions in general...)
EDIT : Overall this is a pretty bad card I would say.
If we compare this card to Cryptic Research, we can see the difference between Rogues and Seekers in the game :p For the same cost and xp, Cryptic Research already does 3 effects (three times "draw 1 card" to allow the comparison with Clean Sneak), to anyone and you don't need to evade 2-3 enemies beforehand ! You pay for the versatility of effect of course but you need to work much harder for an overall lesser result sadly... :/