Navy woman has low rent (4)
I believe the answer is:
wren
'navy woman' is the definition.
'Wren' can be an answer for 'woman'. I am not certain of the 'navy' bit.
'low rent' is the wordplay.
'WREN' is hidden within the letters.
But, I'm unsure how this is indicated.
'has' acts as a link.
Can you help me to learn more?
(Other definitions for wren that I've seen before include "Jenny?" , "serving girl" , "Member of the former Women's Royal Naval Service" , "English church architect, d. 1723" , "She served" .)