Figures the nurse is out to capture the doctor (7)
I believe the answer is:
numbers
'figures' is the definition.
(I know this)
'nurse is out to capture the doctor' is the wordplay.
'is out' is an anagram indicator (out can mean wrong or inaccurate).
'to capture' indicates putting letters inside.
'the doctor' becomes 'mb' (Bachelor of Medicine, Medicinae Baccalaureus).
'nurse' anagrammed gives 'nuers'.
'nuers' placed around 'mb' is 'NUMBERS'.
'the' acts as a link.
(Other definitions for numbers that I've seen before include "Biblical book - anaesthetics" , "which may knock you out?" , "See 3" , "Principal features of mathematics" , "They subdue the pain" .)