Sympathetic behaviour principally seen in bearded men, curiously (7,6)
I believe the answer is:
bedside manner
'sympathetic behaviour' is the definition.
'bedside manner' can be an answer for 'behaviour' (bedside manner is a kind of behaviour). I am not certain of the 'sympathetic' bit.
'principally seen in bearded men curiously' is the wordplay.
'principally' suggests taking the first letters.
'curiously' indicates anagramming the letters.
The initial letter of 'seen' is 's'.
's'+'in'+'bearded'+'men'='sinbeardedmen'
'sinbeardedmen' with letters rearranged gives 'BEDSIDE MANNER'.
Can you help me to learn more?
(Other definitions for bedside manner that I've seen before include "Doctor's approach or attitude to a patient" , "Doctor's personal quality?" , "Reassuring trait of doctor" , "Doctor's people skills?" , "9 bearing" .)