What about craft for Gaia? (5)
I believe the answer is:
earth
'gaia?' is the definition.
(Gaia is the personification of Earth in Greek myth)
'what about craft' is the wordplay.
'what' becomes 'eh' (sound used to ask 'what?' or 'pardon?').
'about' indicates putting letters inside.
'craft' becomes 'art' (both can mean cunning or trickery).
'eh' going around 'art' is 'EARTH'.
'for' acts as a link.
(Other definitions for earth that I've seen before include "Our favourite planet" , "Connection between an electrical device and conductor" , "Huge cost" , "Fox's burrow" , "Where some creatures live" .)