So you know where to split the 2 clues? The first part of 25 is the definition for the first part of the other clue. The last part of the other clue is the definition for the second part of 25.
I've done about half of this and now I'm properly stuck, in the NE and SW corners. Some hints for 5ac "Solder part in home" and 29dn "With no publicity takes on screen icon" would be greatly appreciated! Thanks in advance.