Group of stars, one of those making a huge splash? (3,6)
I believe the answer is:
big dipper
'group of stars one' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'those making a huge splash?' is the wordplay.
I cannot quite see how this works, but
'a' could be 'per' (eg 'one a day' means 'one per day') and 'per' is present in the answer.
'huge' could be 'big' (similar in meaning) and 'big' is present in the answer.
The remaining letters 'dip' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'of' acts as a link.
Can you help me to learn more?
(Other definitions for big dipper that I've seen before include "switchback" , "Roller coaster - The Plough (in the US)" , "Fairground ride" , "North American 24 across" , "rollercoaster" .)