Live on the edge (6)
'live' is the definition.
(I know that reside is a more specific form of the action live)
'on the edge' is the wordplay.
'on' becomes 're' ('on' can be mean 'with reference to').
'the edge' becomes 'side' (edge can mean the side of something).
're'+'side'='RESIDE'
(Other definitions for reside that I've seen before include "Lodge" , "Hang out with" , "Live (at an address)" , "Desire (anag) - to live" , "Dwell - settle" .)
'live on the edge' is the definition.
I can't tell whether this defines the answer.
'live on the edge' is the wordplay.
'live' becomes 'be' (synonyms).
'on' says to put letters next to each other (in a down clue, letters appear on others).
'the edge' becomes 'side' (edge can mean the side of something).
'be'+'side'='BESIDE'
Can you help me to learn more?
(Other definitions for beside that I've seen before include "Very near to" , "Adjacent to" , "Next door to" , "Next to - compared with" , "- - the point" .)