A number of words are misspelled, such as "hordes" (6)
I believe the answer is:
crowds
'hordes' is the definition.
(I've seen this before)
'a number of words' is the wordplay.
'a number' becomes 'c' (C is an example).
'of' indicates an anagram (the answer comes from or 'of' the letters).
'words' is an anagram of 'rowds'.
'c'+'rowds'='CROWDS'
'are misspelled such as' acts as a link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for crowds that I've seen before include "Hordes" , "huge turnout?" , "Hosts" , "Large numbers of people" , "Swarms" .)