Acting-mad, gets a new small lorry (5-6)
I believe the answer is:
stage-struck
'acting-mad' is the definition.
I can't tell whether this definition defines the answer.
'gets a new small lorry' is the wordplay.
'new' is an anagram indicator.
'small' becomes 's' (abbreviation - e.g. clothes size).
'lorry' becomes 'truck' (I've seen this before).
'gets'+'a'='getsa'
'getsa' anagrammed gives 'stage'.
'stage'+'s'+'truck'='STAGE-STRUCK'
Can you help me to learn more?
(Other definitions for stage-struck that I've seen before include "Madly keen to be an actor" , "Longing for acting career" , "Fascinated by the theatre, especially with a desire to act" , "Passionate about acting" , "Passionate about things theatrical" .)