War criminal cuddles East German hospitality worker (7)
I believe the answer is:
hostess
'hospitality worker' is the definition.
'hostess' can be an answer for 'worker' (hostess is a kind of worker). I'm not sure about the 'hospitality' bit.
'war criminal cuddles east german' is the wordplay.
'war criminal' becomes 'hess' (I can't justify this - if you can you should give a lot more credence to this answer).
'cuddles' means one lot of letters goes inside another.
'east german' becomes 'ost' ('east' in German).
'hess' enclosing 'ost' is 'HOSTESS'.
Can you help me to learn more?
(Other definitions for hostess that I've seen before include "She looks after guests" , "Air stewardess" , "She entertains guests" , "party organiser" , "who welcomes guests?" .)