Crossword Genius

Sister with new uniform, head of nurses (3)

Ross

I believe the answer is:

nun

'sister' is the definition.
(sister is a term of address for a nun)

'new uniform head of nurses' is the wordplay.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'uniform' becomes 'u' (phonetic alphabet: alpha, bravo, charlie etc.).
'head of' says to take the initial letters.
The first letter of 'nurses' is 'n'.
'n'+'u'+'n'='NUN'

'with' acts as a link.

(Other definitions for nun that I've seen before include "Member of convent" , "Woman in religious order" , "One who's taken vows" , "Woman in religious community" , "Domestic fancy pigeon" .)

I've seen this clue in The Times.
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