Criticise heir welcoming total rogue (11)
I believe the answer is:
rapscallion
'rogue' is the definition.
(synonyms)
'criticise heir welcoming total' is the wordplay.
'criticise' becomes 'rap' (I've seen this before).
'heir' becomes 'scion' (I've seen this before).
'welcoming' means one lot of letters goes inside another (in sense of 'inviting in').
'total' becomes 'all' (I've seen this before).
'scion' placed around 'all' is 'scallion'.
'rap'+'scallion'='RAPSCALLION'
(Other definitions for rapscallion that I've seen before include "Disreputable person - local sprain (anag)" , "mischief maker" , "Plain carols (anag) - rogue" , "Terror" , "Scoundrel" .)