Get together and see lambs gambolling (8)
I believe the answer is:
assemble
'get together' is the definition.
(synonyms)
'see lambs gambolling' is the wordplay.
'gambolling' is an anagram indicator (letters run or gambol around).
'see'+'lambs'='seelambs'
'seelambs' with letters rearranged gives 'ASSEMBLE'.
'and' is the link.
(Other definitions for assemble that I've seen before include "Gather together at meeting place" , "Bring or gather together" , "fit together" , "Manufacture" , "Build" .)