Unfriendly father at the front of old hovel (6)
I believe the answer is:
frosty
'unfriendly' is the definition.
(I've seen this before)
'father at the front of old hovel' is the wordplay.
'father' becomes 'fr'.
'at' says to put letters next to each other.
'the front of' says to take the initial letters.
'hovel' becomes 'sty' (I've seen this in other clues).
The first letter of 'old' is 'o'.
'fr'+'o'+'sty'='FROSTY'
(Other definitions for frosty that I've seen before include "Chilly in attitude, like musical snowman" , "Lacking in warmth" , "Icy cold" , "Cold and unfriendly (glance or reception?)" , "showing little enthusiasm" .)