Relatively, they saunter around without hesitation (5)
I believe the answer is:
aunts
'relatively they' is the definition.
The definition suggests an adverb but the answer is not.
'saunter around without hesitation' is the wordplay.
'around' indicates the central letters.
'without' is an insertion indicator (some letters go outside or 'without' others).
'hesitation' becomes 'as' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
The middle letters of 'saunter' are 'unt'.
'unt' going inside 'as' is 'AUNTS'.
Can you help me to learn more?
(Other definitions for aunts that I've seen before include "Relatives get an odd US tan" , "Relatives get bad US tan" , "Sally and others" , "Female relatives, usually older" , "Elderly female relations" .)