Answer:
When the Turn Player Summons the named monster, the Trigger Effect of their opponent's "Cloak and Dagger" activates automatically. It is not possible for the Turn Player to use priority to activate the Ignition Effect of one of their monsters.
It would not be possible for the player to activate "Snipe Hunter's" effect in this case.
Since this Chain is activated in response to the Summon of a monster, other effect that also want to activate in the response to the Summon may do so. So "Torrential Tribute" can be chained to the effect of "Cloak and Dagger".
Curtis Schultz
UDE Netrep
CurtisSchultz_Netrep@hotmail.com
"Removing your finger. That's a good power, Uncle Glen. I must have it..."