Inferior guide's coat has sign of identification (5)
I believe the answer is:
badge
'sign of identification' is the definition.
'badge' can be an answer for 'identification' (thesaurus). I am not sure about the 'sign of' bit.
'inferior guide's coat' is the wordplay.
'inferior' becomes 'bad' (similar in meaning).
'coat' means to remove the middle letters (only the letters which coat the word are used).
'guide' with its middle taken out is 'ge'.
'bad'+'ge'='BADGE'
'has' is the link.
Can you help me to learn more?
(Other definitions for badge that I've seen before include "Label with name or status" , "Lapel emblem" , "Symbol worn for identification" , "Emblem of belonging" , "Identifying emblem" .)