Suitor making maid err badly (7)
I believe the answer is:
admirer
'suitor' is the definition.
(I've seen this before)
'making maid err badly' is the wordplay.
'making' is an anagram indicator.
'badly' is an anagram indicator.
'maid' anagrammed gives 'admi'.
'err' with letters rearranged gives 'rer'.
'admi'+'rer'='ADMIRER'
(Other definitions for admirer that I've seen before include "sweetheart" , "Suitor; devotee" , "A young lady's beau - he thinks she's great" , "One who thinks highly or romantically of" , "Married to one who cherishes" .)