Centre in Telford, not just a pleasure ground (7)
I believe the answer is:
funfair
'a pleasure ground' is the definition.
('funfair' can be a synonym of 'pleasure ground')
'centre in telford not just' is the wordplay.
'centre in' indicates the central letters.
'not just' becomes 'unfair' ('unfair' is the opposite to 'just').
The centre of 'telford' is 'f'.
'f'+'unfair'='FUNFAIR'
(Other definitions for funfair that I've seen before include "Amusement park" , "place of amusement" , "entertainment for the family?" , "Swings and roundabouts" , "Amusements here" .)