Beetle, or small mobile home? (7)
I believe the answer is:
scamper
'beetle' is the definition.
(beetle can mean to scamper around)
'small mobile home?' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'mobile home?' becomes 'camper' ('camper' can be a synonym of 'mobile home').
's'+'camper'='SCAMPER'
'or' is the link.
(Other definitions for scamper that I've seen before include "Run along quickly" , "Run and skip playfully about" , "Proceed hurriedly" , "Skip around" , "Skip playfully with campers" .)