Recent arrival, fantastic wee bairn regularly visited (6)
I believe the answer is:
newbie
'recent arrival' is the definition.
'newbie' can be an answer for 'arrival' (I have seen 'Inexperienced arrival ' mean 'newbie' so perhaps 'arrival' could also mean 'newbie'). I'm not certain of the 'recent' bit.
'fantastic wee bairn regularly visited' is the wordplay.
'fantastic' is an anagram indicator (a fantastic or improbable ordering of the letters).
'regularly visited' means one should take alternating letters (letters are taken at regular intervals).
The alternating letters of 'bairn' are 'bin'.
'wee'+'bin'='weebin'
'weebin' with letters rearranged gives 'NEWBIE'.
Can you help me to learn more?
(Other definitions for newbie that I've seen before include "Inexperienced arrival" , "Beginner" , "Starter - win bee (anag)" , "Novice" , "Greenhorn" .)