Crossword Genius

It’s nothing for wild bees to be overweight (5)

Ross

I believe the answer is:

obese

'be overweight' is the definition.
(thesaurus)

'it's nothing for wild bees' is the wordplay.
'it's nothing' becomes 'o' (looks like zero - 0).
'for' says to put letters next to each other.
'wild' indicates an anagram.
'bees' with letters rearranged gives 'bese'.
'o'+'bese'='OBESE'

'to' is the link.

(Other definitions for obese that I've seen before include "Grossly fat" , "More than podgy" , "Clinically overweight" , "Unusually fat" , "Extremely portly" .)

I've seen this clue in the Evening Standard.
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