German boy is pleased (4)
I believe the answer is:
glad
'is pleased' is the definition.
(similar in meaning)
'german boy' is the wordplay.
'german' becomes 'g' (abbreviation).
'boy' becomes 'lad' (informal term for boy).
'g'+'lad'='GLAD'
(Other definitions for glad that I've seen before include "bright?" , "Joyful" , "Contented" , "happiness" , "Feeling pleasure" .)