Happy People's Princess almost eaten by rodent (7)
I believe the answer is:
radiant
'happy' is the definition.
(thesaurus)
'princess almost eaten by rodent' is the wordplay.
'princess' becomes 'diana' (I have seen 'British princess' mean 'diana' so perhaps 'princess' could also mean 'diana').
'almost' means to remove the last letter (most of the word but not all of it).
'eaten' means one lot of letters goes inside another.
'by rodent' becomes 'rat' (rat is a kind of rodent. I am not sure about the 'by' bit.).
'diana' with its final letter taken off is 'dian'.
'dian' inserted inside 'rat' is 'RADIANT'.
'people's' is the link.
I am not very happy about this link. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for radiant that I've seen before include "with good humour" , "glowing with happiness" , "Brilliant" , "Very conspicuous" , "Sending out light, glowing" .)