Wee Hearts shock United making a comeback in group (5,4)
I believe the answer is:
uriah heep
'in group' is the definition.
'uriah heep' can be an answer for 'group' (I have seen 'group of players' mean 'uriah heep' so perhaps 'group' could also mean 'uriah heep'). I am not certain of the 'in' bit.
'wee hearts shock united making a comeback' is the wordplay.
'wee' becomes 'pee' (both can mean to urinate).
'hearts' becomes 'h' (abbreviation used in card games e.g. bridge).
'shock' becomes 'hair' (shock can mean a mass of hair).
'united' becomes 'U' (as in Man U, Manchester United).
'making a comeback' is a reversal indicator.
'pee'+'h'+'hair'+'u'='peehhairu'
'peehhairu' back-to-front is 'URIAH HEEP'.
Can you help me to learn more?
(Other definitions for uriah heep that I've seen before include "'umble character from David Copperfield" , "Famous Dickens hypocrite from 'David Copperfield'" , "Iconic hypocrite from Dickens' 'David Copperfield'" , "Obsequious clerk" , "Villain in David Copperfield" .)