Going round in circles here! 54a - person in custody (detainee); 54d public protest (demo); 55d a football side (team) 39d the rank and file (grass roots) - 60a - at a snail's pace - assuming that above answers correct gives me - s_o_m_t_ _ _ (slow motion). However, 56d quits - I've got "ends" as answer - so that means that last letter in "slow motion" is the "s" in "ends". Help needed here! Hope you can follow above.