Dad's nice playing with son exuding love and sincerity (10)

I believe the answer is:

candidness

'sincerity' is the definition.
(thesaurus)

'dad's nice playing with son exuding love' is the wordplay.
'playing with' indicates an anagram.
'exuding' is a deletion indicator.
'love' becomes 'o' (love means zero in tennis).
'son' with 'o' removed is 'sn'.
'dads'+'nice'='dadsnice'
'dadsnice' anagrammed with 'sn' gives 'CANDIDNESS'.

'and' is the link.

I've seen this clue in The Telegraph.

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