16a ok, it’s a tough one but maybe not unheard of as a concept to equate an institution with the people making it up
26a quartet is IV, 2nd of Beethoven is E. Prob not the best clue.
4d OK the idea is for one part to be appended “to” the other part. Misleading for sure but not unheard of
5d to repeat is also to hiccup, hence hic
6d GEN is info which is inside the other components. In charge is IC
8d my bad - a typo. Lemme fix. Thanks for picking that up.
19 took in stands for ATE in this clue