Bachelor with deficiency - he won't make the first move (5)
I believe the answer is:
black
'he won't make the first move' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'bachelor with deficiency' is the wordplay.
'bachelor' becomes 'B' (abbreviation e.g. BA=Bachelor of Arts).
'with' means one lot of letters go next to another.
'deficiency' becomes 'lack' (synonyms).
'b'+'lack'='BLACK'
Can you help me to learn more?
(Other definitions for black that I've seen before include "Unofficial" , "Extremely dark" , "Sort of guard, panther, jack or pudding..." , "Uncommon H [HORSE]" , "Side in chess" .)