Bug an Ingrid or Heidi, perhaps (6)
I believe the answer is:
german
'ingrid or heidi perhaps' is the definition.
(Ingrid and Heidi are German names)
'bug an' is the wordplay.
'bug' becomes 'germ' (synonyms).
'germ'+'an'='GERMAN'
(Other definitions for german that I've seen before include "European language" , "Goethe's language" , "Nationality of citizen of Bonn" , "Helmut?" , "Composer, English? Yes" .)