Cool Monkee detailed Tork initially being lazy (8)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

IN (cool – as in ‘trendy’) DOLEN z (Micky Dolenz, drummer with the Monkees) missing the last letter or ‘de-tailed’ T (first or ‘initial letter of Tork – Peter Tork was the bass guitarist and keyboard player in the Monkees)