Learner is brought into part of hospital as recruit (6)
I believe the answer is:
enlist
'recruit' is the definition.
(enlisting is a kind of recruiting)
'learner is brought into part of hospital' is the wordplay.
'learner' becomes 'l'.
'brought into' indicates putting letters inside.
'part of hospital' becomes 'ent' (I've seen this in other clues**).
'l'+'is'='lis'
'lis' placed inside 'ent' is 'ENLIST'.
'as' is the link.
(Other definitions for enlist that I've seen before include "Sign on -- 13 (anag)" , "Join the armed forces" , "Take the Queen's shilling" , "Engage" , "Join the armed services" .)