There is no direct anagram, i.e., a seven-letter anagram, of 'anagram'. Nor could I find many anagrams that made sense. 'Raga man" and "agar man" are the only ones I spotted.
…However, a number of words can be derived from those letters. Here are my results from SOWPODS, the Scrabble dictionary: -bash $ an -d sowpods 'anagram' anagram argan am grana am grana ma argan ma grama na grama an gran ama gnar ama rang ama rang maa gnar maa gran maa arna mag rana mag rana gam arna gam gram ana marg ana raga man agar man agar mna agar nam raga mna raga nam maar gan mara gan mara nag maar nag ran gama ran agma ran ag am ran ag ma rag mana gar mana gar naam rag naam rag na am gar na am gar an am gar an ma gar na ma rag an am rag an ma rag na ma arm naga mar naga ram naga ram anga mar anga arm anga arm na ag mar na ag ram na ag ram an ag mar an ag arm an ag ar manga ar gan am ar nag am ar nag ma ar gan ma ar man ag ar mna ag ar nam ag ar na mag ar an mag ar an gam ar na gam -bash $ an -w -d sowpods 'anagram' aa ag aga agama agar agma am ama amarna an ana anagram anga ar argan arm arna gam gama gan gar gnar gram grama gran grana ma maa maar mag man mana mang manga mar mara marg mna na naam nag naga nam rag raga ragman ram ran rana rang ( Full Answer )