A sweetheart's getting caught in hiding places perhaps (7)
I believe the answer is:
alcoves
'hiding places perhaps' is the definition.
'a sweetheart's getting caught in' is the wordplay.
'sweetheart's' becomes 'loves' (I've seen this in other clues).
'getting caught' becomes 'c' (I can't justify this - if you can you should believe this answer much more).
'in' indicates putting letters inside.
'loves' enclosing 'c' is 'lcoves'.
'a'+'lcoves'='ALCOVES'
(Other definitions for alcoves that I've seen before include "set-back areas" , "Small recesses in a larger room" , "shady places" .)