One of those watching the stars with Lawrence and Lesley Clare entertaining Oscar and Penny (9)
I believe the answer is:
telescope
'one' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'those watching the stars with lawrence and lesley clare entertaining oscar and penny' is the wordplay.
I cannot really understand how this works, but
'lawrence' could be 'te' and 'te' is found in the answer.
'oscar' could be 'o' (phonetic alphabet: alpha, bravo, charlie etc.) and 'o' is located in the answer.
'penny' could be 'p' and 'p' is found within the answer.
'clare' could be 'ce' (I've seen this in other clues) and 'ce' is located in the leftover letters.
The remaining letters 'les' is a valid word which might be clued in a way I don't see.
This may be the basis of clue (or it may be nonsense).
'of' acts as a link.
Can you help me to learn more?
(Other definitions for telescope that I've seen before include "Crush together" , "Instrument to magnify the image of distant objects" , "Instrument for viewing distant objects" , "Shrink - optical instrument" , "Glass" .)