Cricket match on TV: fourth of batsmen in experimental gear (4,5)

I believe the answer is:

test-tubes

I'm a little stuck... Click here to teach me more about this clue!

'cricket match on tv fourth of batsmen in experimental gear' is the definition.
I can't tell whether this defines the answer.

'cricket match on tv fourth of batsmen' is the wordplay.
'cricket match' becomes 'test' (a test is a kind of cricket match).
'on' means one lot of letters go next to another (in a down clue, letters appear on others).
'tv' becomes 'tube' (I've seen this before).
'fourth of batsmen' becomes 's' (4th letter of 'batsmen').
'test'+'tube'+'s'='TEST-TUBES'

Can you help me to learn more?

(Other definitions for test-tubes that I've seen before include "Lab vessels" , "Lab glassware" .)

I've seen this clue in The Everyman puzzle in The Observer.

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