Crossword Genius

Some Dublin troops opening passage (5)

Ross

I believe the answer is:

intro

'opening passage' is the definition.
(I've seen this before)

'some dublin troops' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'INTRO' is hidden within 'dublin troops'.

(Other definitions for intro that I've seen before include "Prelude" , "Start of work" , "Song's first few bars" , "Opening passage (of music) (colloq.)" , "Preamble" .)

I've seen this clue in The Sun.
Want a hint initially instead of a full solution? Install my app