I assume the answer is �ris�for two down, but hate not knowing all the why�s and wherefores. Here is the clue:�Detailed Gaelic eyepiece�. (4) I have i?i?. I can see iris is a piece of the eye, though it�s strangely worded, but what does the rest of the clue refer to? I�m away from home, so don�t have my trusty Chambers.