Right, could a gasman finally get to change boiler? (8)
I believe the answer is:
cauldron
'boiler?' is the definition.
(large pot for boiling things)
'right could a gasman finally get to change' is the wordplay.
'right' becomes 'r' (common abbreviation).
'finally' says to take the final letters.
'get to change' indicates an anagram.
The final letter of 'gasman' is 'n'.
'r'+'could'+'a'+'n'='rcouldan'
'rcouldan' is an anagram of 'CAULDRON'.
(Other definitions for cauldron that I've seen before include "Witches' pot" , "Witch's brewing pot" , "Large cooking pot" , "Very large pot used for boiling" , "A large deep pot for boiling things" .)