Dad keeps an old sheep in view (8)
I believe the answer is:
panorama
'view' is the definition.
(synonyms)
'dad keeps an old sheep' is the wordplay.
'dad' becomes 'pa' (synonyms).
'keeps' means one lot of letters goes inside another.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'sheep' becomes 'ram' (ram is a kind of sheep).
'an'+'o'+'ram'='anoram'
'pa' placed around 'anoram' is 'PANORAMA'.
'in' acts as a link.
(Other definitions for panorama that I've seen before include "Wide open view" , "Wide-angle view" , "Scene, vista" , "Wide view of region" , "Unbroken view of surrounding area" .)