The Queen perhaps may be working during month (7)
I believe the answer is:
monarch
'the queen perhaps' is the definition.
'working during month' is the wordplay.
'working' becomes 'on'.
'during' indicates putting letters inside.
'month' becomes 'march' (March is an example**).
'on' going inside 'march' is 'MONARCH'.
'may be' is the link.
(Other definitions for monarch that I've seen before include "Eg, king, queen, emperor" , "Sovereign; butterfly" , "one over realm?" , "Butterfly (emperor, say?)" , "Stag in Landseer picture" .)