Missiles constructed in labs out of love? (5)

I believe the answer is:

bolas

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'missiles constructed' is the definition.
I can't judge whether this defines the answer.

'in labs out of love?' is the wordplay.
'in' means one lot of letters goes inside another.
'out of' is an anagram indicator.
'love?' becomes 'o' (love means zero in tennis).
'labs' with letters rearranged gives 'blas'.
'blas' placed around 'o' is 'BOLAS'.

Can you help me to learn more?

(Another definition for bolas that I've seen is " What a gaucho may have".)

I've seen this clue in the Evening Standard.

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