Solution for 26 May cryptic crossword clue

Birds, some of them usually flightless (4)

Solution – emus

A hidden word clue today.  (For more discussion about different clue types see the sidebar under the list of popular posts)

An emu is a large Australian bird – like this:

 If you look carefully you can see “emus” within the rest of the clue – as usual spread over 2 words.  The indicator that it might be a hidden word clue is “some of”.