WW2 ace crossing loch finds God (6)
I believe the answer is:
balder
'god' is the definition.
(Balder is an example)
'ww2 ace crossing loch' is the wordplay.
'ww2 ace' becomes 'bader' (pilot Douglas Bader).
'crossing' means one lot of letters goes inside another.
'loch' becomes 'l'.
'bader' placed around 'l' is 'BALDER'.
'finds' is the link.
(Other definitions for balder that I've seen before include "with less growth on" , "Norse god - having less hair" , "Son of Odin - having less on top?" , "Less hairy on top" .)