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48a. Pathetic quintet bound by obvious connection (9)
G?A?????E. Grapevine? If so why?
55a. Two means of getting cleaned out? (6)
????E. Sponge?
40d. Blue representation of N2. (N to the power of two..squared) (8)
S?U???E? Squeezed? Squeegee?
47d converted note to yen, elevated guru put in order (4,2)
Tidy up?
Cannot think any more! Help anyone?

48 Plaintive

55 Yes Sponge, to wash and to beg

40 Squander , anag of N Squared

47 Tidy up

Pundit reversed with N ghanged to Y

Thanks mamya
Had dig in not dip in which did not help.
Still, I am not in your league!