Using pseudonym, noticing anagrams with surprised cry? (9)
I believe the answer is:
incognito
'using pseudonym' is the definition.
'incognito' can be an answer for 'pseudonym' (I've seen this in another clue). I am not sure about the 'using' bit.
'noticing anagrams with surprised cry?' is the wordplay.
'anagrams with' indicates an anagram (I've seen 'anagram' mean this).
'surprised cry?' becomes 'O' (O!).
'noticing' mixed up with 'o' gives 'INCOGNITO'.
Can you help me to learn more?
(Other definitions for incognito that I've seen before include "as disguised person appears?" , "Under assumed identity" , "as something else" , "With true identity concealed" , "appear unidentifiable" .)