German leader gets terribly fit, for the present (4)
I believe the answer is:
gift
'the present' is the definition.
(I've seen this before)
'german leader gets terribly fit' is the wordplay.
'leader' says to take the initial letters.
'gets' says to put letters next to each other.
'terribly' indicates an anagram.
The first letter of 'german' is 'g'.
'fit' anagrammed gives 'ift'.
'g'+'ift'='GIFT'
'for' acts as a link.
(Other definitions for gift that I've seen before include "Knack" , "A present or a natural ability" , "Present - natural aptitude" , "A present or gratuity" , "Give away" .)