Watch over (5)
'watch over' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tend that I've seen before include "Incline, lean" , "Go in a particular direction; look after" , "Have inclination or care for" , "Look after (a patient)" , "Be inclined - look after" .)
'watch over' is the definition.
(guarding is a kind of watching over)
This is the entire clue.
(Other definitions for guard that I've seen before include "Sentry" , "Police" , "Protect" , "One keeps watch" , "Screw" .)