See adult Gillian not half leading nimbly (7)
I believe the answer is:
agilely
'nimbly' is the definition.
(thesaurus)
'see adult gillian not half leading' is the wordplay.
I cannot really understand how this works, but
'see' could be 'ely' (example where cathedral located in diocese) and 'ely' is located in the answer.
'adult' could be 'a' and 'a' is found in the answer.
The remaining letters 'gil' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Another definition for agilely that I've seen is " With quickness and lightness".)