Present teacher hugged by Welsh girl briefly in Welsh region (9)
I believe the answer is:
snowdonia
'welsh region' is the definition.
(Welsh national park)
'present teacher hugged by welsh girl briefly' is the wordplay.
'present' becomes 'now' (both can mean the current period).
'teacher' becomes 'don' (don is a kind of teacher).
'hugged by' indicates putting letters inside (I've seen this in other clues).
'welsh girl' becomes 'sian' (common Welsh name).
'briefly' means to remove the last letter.
'now'+'don'='nowdon'
'sian' with its final letter taken off is 'sia'.
'nowdon' placed inside 'sia' is 'SNOWDONIA'.
'in' is the link.
(Other definitions for snowdonia that I've seen before include "Win a snood in the Welsh county" , "Welsh mountain area" , "mountains" , "National park in Wales" , "Britain's third national park, designated 1951" .)