Hi ixion
I like Eastwood & Howl.
I thought maybe Eastwood but had same reservation about actor being used twice. All I had was:
??S????? but if starting letters are H, E, R & D then it seemed to fit. Hadn't heard of SADO island but I'm sure TWO & SADO gives the sub!
HOWL is great - cry and sub of Bird in 4d - thanks!! Confirms H as a starting letter.
How about REGIMENTAL for 11ac? def 'of a particular unit'; sub in 5d anagram of 'name legit'?