Have fun in small place like Dover? (5)
I believe the answer is:
sport
'have fun' is the definition.
'small place like dover?' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'place like dover?' becomes 'port' (Dover is a port).
's'+'port'='SPORT'
'in' is the link.
(Other definitions for sport that I've seen before include "Put on" , "eg Tennis" , "Show off" , "Fun; wear" , "Exhibit publicly; eg soccer" .)