Crossword Puzzle ID necessity, often

Clue: ID necessity, often

Iditarod necessity (SLED with 4 letters)
Start of an idle question (e.g. DOUNIFORMSINTHE with 15 letters)
Identify, so to speak (PEG with 3 letters)
Male lion identifier (MANE with 4 letters)
... do you have any idea what you're talking about? (MYREPLYISNO with 11 letters)
Play banjo idly (THRUM with 5 letters)
"The Bourne Identity" setting: Abbr. (EUR with 3 letters)
"__ ideal world ..." (INAN with 4 letters)
Opening necessity? (DOORKNOB with 8 letters)
Former "Idol" judge, to fans (JLO with 3 letters)