Left individual, a German, getting extra rest
I believe the answer is:
liein
'extra rest' is the definition.
'lie in' can be an answer for 'rest' (I have seen 'Extended rest ' mean 'lie in' so perhaps 'rest' could also mean 'lie in'). I am not sure about the 'extra' bit.
'left individual a german getting' is the wordplay.
'left' becomes 'L' (common abbreviation).
'individual' becomes 'i' (Roman numeral for one).
'a german' becomes 'ein' ('a' in German).
'getting' means one lot of letters go next to another.
'l'+'i'+'ein'='LIE-IN'
Can you help me to learn more?
(Other definitions for liein that I've seen before include "be dormant" , "Prolonged rest" , "Prolonged bedtime" .)