Merkel, perhaps not entirely relevant (6)
I believe the answer is:
german
'merkel perhaps' is the definition.
(Angela Merkel)
'not entirely relevant' is the wordplay.
'not entirely' means to remove the last letter.
'relevant' becomes 'germane' ('germane' can be similar in meaning to 'relevant').
'germane' with its final letter taken off is 'GERMAN'.
(Other definitions for german that I've seen before include "European national" , "Helmut?" , "Alsatian" , "Composer, English? Yes" , "Goethe's language" .)