A bit lame, perhaps, at intervals (9)
I believe the answer is:
piecemeal
'a bit lame perhaps at intervals' is the definition.
I can't tell whether this definition defines the answer.
'a bit lame perhaps' is the wordplay.
'a bit' becomes 'piece' (a bit is a small piece).
'perhaps' indicates an anagram.
'lame' is an anagram of 'meal'.
'piece'+'meal'='PIECEMEAL'
Can you help me to learn more?
(Other definitions for piecemeal that I've seen before include "Unsystematically" , "step by step" , "taken bit by bit" , "Gradually, little by little" , "A bit at a time" .)