Hi alwayspuzzled,
2nd. The letters you have are fine, extra word polish; the usual abbreviation for Spain in a synonym for cross. The amended clue (and answer) will become clear if you look in Chambers.
Remember 5 pairs of the extra words cryptically least to the same 8 letter word which is in the song title and may well be the last word in the song, I didn't need to go that far.
Hope this helps.